Apart from the families of the victims, there were others who
suffered as a result of the accident and its aftermath. One of those was
Captain Leslie Simpson, who at the same briefing as Captain Collins on 9
November 1979 and who commanded the Antarctic flight of 14 November 1979. His
evidence was relied on by ALPA to establish that the McMurdo waypoint conveyed
during the briefing was not at McMurdo Station but was, instead, some miles
away, out to the west. The significance was that on the night before his
flight, Captain Collins plotted the track, using a print-out of a flight plan.
Given what occurred the next day, that flight plan must have had the McMurdo
waypoint away from McMurdo Station, out to the west. If the waypoint conveyed
during the briefing was at McMurdo Station, Captain Collins’s plotting exercise
would have revealed a conflict, which he was obliged to resolve.
The briefing of 9 November 1979 was in two parts. The first
part consisted of an audio-visual presentation conducted by Captain John Wilson.
The second part was a simulator exercise conducted by Captain Ross Johnson.
Both were adamant that the McMurdo waypoint conveyed during the briefing was nowhere
other than McMurdo Station. Both witnesses’ evidence was confirmed by other
independent evidence. As regards Captain Wilson, his evidence was confirmed by
the typewritten script used for the audio-visual presentation. As regards
Captain Johnson, his evidence was confirmed by what occurred during the
simulator exercise, when the simulator was repositioned to the McMurdo
waypoint. It ended up at McMurdo Station, not miles out to the west.
Problems with Captain Simpson’s Evidence
Captain Simpson’s evidence was that the position of the waypoint
conveyed during the briefing was not at McMurdo Station. The first problem with
that evidence was that Captain Simpson sat through the audio-visual
presentation and completed the simulator exercise, during which he was
presented with information that the waypoint was at McMurdo Station, not somewhere
else - but he did not ask any question about the position of the waypoint.
As to the source of his belief about the position of the
waypoint, Captain Simpson referred to a print-out of a flight plan that he
sighted during the briefing. It has always been assumed that the print-out was for
a flight of two weeks earlier where the latitude of the McMurdo waypoint was
164 degrees east, being two full degrees west of McMurdo Station at 166 degrees.
Captain Simpson’s evidence was that he related the waypoint to a map available
at the briefing and estimated that the distance between the waypoint and
McMurdo Station was about 10 nautical miles. The problem with that evidence was
that the map had a scale which made it obvious that the distance was well over
20 nautical miles.
Captain Wilson’s Print-Outs of Flight Plans
Captain Wilson brought four print-outs of flight plans to the
briefing. They were all from a flight he had been on, two weeks before. One was
for the route to the McMurdo area and one was for the alternate route to the
South Magnetic Pole (which, for obvious reasons, did not have had any waypoint
for the McMurdo area). The other two print-outs were for the same two routes but
were the “as flown” versions, being the same print-out with various handwritten
notations recording what occurred during the flight.
On the two print-outs of flights to the McMurdo area the
longitude of the McMurdo waypoint was 164 degrees.
In the unmarked version of the flight plan to the McMurdo
area, the waypoint was underlined.(MacFarlane p79) In the “as flown” version, the waypoint was
highlighted. (Exhibit 206C)
Waypoint Underlined / Highlighted
First Officer Gabriel, seated next to Captain Simpson at the
briefing,
said: “During the talk through of these notes Captain Wilson handed out some
flight plans from a previous Antarctic flight. He told us that they were there
for us to look at but we were not to take them away with us. I looked at a
flight plan depicting a route to McMurdo and I remember that the McMurdo
waypoint was underlined or highlighted in some way.” (MacFarlane p232)
The statement about seeing the waypoint underlined or
highlighted was in the written statement prepared for First Officer Gabriel by
ALPA. The significance of his
reference to underlining/highlighting was that no similar statement was made by
Captain Simpson, who was also called as a witness by ALPA.
It was clearly in ALPA’s interests to have Captain Simpson
looking at an underlined / highlighted waypoint with a longitude of 164
degrees. There is little doubt that ALPA would have asked Captain Simpson if he
observed any underlining or highlighting, to which his answer must have been
‘no’. Given the lack of any reference by Captain Simpson to
underlining/highlighting, it possible that he was not looking at one of the two
McMurdo area print-outs brought to the briefing by Captain Wilson, because the
waypoint on one was underlined and on the other was highlighted.
Other Print-Outs
Captain Simpson was interviewed by Ron Chippendale in March 1980.
The interview was taped and transcribed, and the transcript was sent to Captain
Simpson for corrections to be made. The transcript included the following: “[Captain
Wilson] had some old flight plans from previous
years flights which he handed out for us to just look at, but didn’t have
enough to give away.”
(emphasis added) (MacFarlane p354)
The print-outs of flight plans brought to the briefing by
Captain Wilson were for a flight of the previous fortnight so would not be
covered by the phrase “previous years
flights”. This raises a question as to whether there were other print-outs
available at the briefing. There was at least one such document, that being the
print-out used to enter the waypoints at the beginning of the simulator
exercise.
Simulator Exercise
According to Captain Johnson, the waypoints were entered by
First Officer Cassin, using a flight plan from October 1977.
(MacFarlane p220) At that time the waypoint was the NDB at McMurdo Station, with a longitude of
166 degrees. Although some of Captain Johnson’s evidence was disputed, no issue
was taken with what he said about the entry of the waypoints.
One of the purposes of the simulator exercise was to practise
a cloud-break procedure overhead the NDB at McMurdo Station. After practising
the change to grid navigation at 60 degrees south the simulator was
repositioned to the McMurdo waypoint. Had one of Captain Wilson’s print-outs
been used to program the simulator, it would have ended up over 20 miles west
of McMurdo Station. There was no evidence from anyone about the simulator
ending up in a wrong location.
First Officer Cassin entered the waypoints, using a print-out
of a flight plan dated October 1977. He was also on the accident flight, in the
wreckage of which was found a print-out of a flight plan, dated October 1977
(MacFarlane p104)– so First Officer Cassin may well have retained the print-out he used to
program the simulator. Whatever the event, there would have been numerous
opportunities during the briefing for Captain Simpson to sight the print-out
and observe the longitude of the McMurdo waypoint which, if it was the October
1977 print-out, would have been 166 degrees. Significantly, the McMurdo
waypoint on the October 1977 print-out recovered from the wreckage had no
underlining or highlighting, which is consistent the lack of any reference to
the topic in Captain Simpson’s evidence.
The October 1977 print-out is consistent with the other
evidence. It explains why Captain Simpson did not ask any question about the
position of the McMurdo waypoint. He could see that it was at McMurdo Station,
which is where he would have expected it to be, and where the audio-visual
presentation was telling him it was, and where the simulator exercise was
telling him it was. (Given the lack of maps at the briefing, he did not then
know that a track to McMurdo Station would cross the summit of Erebus.)
The October 1977 print-out is also consistent with Captain
Simpson’s being surprised when he
discovered that the waypoint was actually more than 20 miles west of McMurdo
Station.
Captain Simpson Noticed A Difference Between Positions
Right from day one Captain Simpson, in reference to the
briefing, spoke of his noticing a difference between positions when he looked
at the print-out of the flight plan. It has always been assumed that he was
looking at one of Captain Wilson’s print-outs and that the difference was the
difference between the position of McMurdo Station and the position of the
McMurdo waypoint, more than 20 miles west. If that was the difference he was
referring to, his evidence made no sense.
If, in reality, Captain Simpson was looking at the October
1977 flight plan when he noted a difference between positions, things fall into
place. There was a difference between positions, but it was a much smaller one,
nowhere near 20 miles. Captain Wilson wrote the co-ordinates of the TACAN on
one of the hand-outs. The TACAN was not located at McMurdo Station. It was to
the south-east, by Williams Field, being the ice runway. The longitude of the
TACAN was 166 degrees 58 minutes. The longitude on the October 1977 print-out
was 166 degrees 41 minutes, a difference of 17 minutes. Captain Simpson would
have quickly concluded that McMurdo Station was a few miles west of the TACAN.
Captain Simpson’s Flight
If it is assumed that the difference noted by Captain Simpson
was that between the TACAN and McMurdo Station, that is completely consistent
with what occurred during Captain Simpson’s flight. He had good weather, so did
not need to fly in nav mode. Nevertheless, he monitored his position in
relation to the nav track. By the end of the sound he was well to the right of
track. He then turned left and headed towards the McMurdo Station / Williams
field area. He believed that the waypoint was at McMurdo Station so he would
therefore be going left of track after passing McMurdo Station and continuing
on to TACAN, given the few miles difference he had observed during the
briefing. Instead, the difference was well over 20 miles, hence his surprise.
The AINS was vital for the return journey and Captain Simpson
was concerned that it might be malfunctioning, so he performed an update over
the TACAN and another over Coleman Island. Then, after he got home, he plotted
the waypoint, but not using the October 1977 print-out, because he did not have
it. He used the print-out for his own flight, where the longitude of the
waypoint was 164 degrees and concluded that there was no malfunction. Given
that the difference in position, which he now knew to be over 20 miles, had
caused him to perform two unnecessary updates, he suggested to Captain Johnson
that future crews be informed.
Captain Simpson’s Initial Statements
A sighting of the October 1977 print-out at the briefing and
a resulting belief that the waypoint was at McMurdo Station are also consistent
with Captain Simpson’s initial statements, when he used his own words. Things
only started to go awry when his apparent words were actually those of ALPA.
The captain’s first interview with Ron Chippendale was on 14
December 1979, two weeks after the accident. Captain Simpson was asked to make a note
recording his recollection of the interview. The note contained the following:
“Did Captain Collins contact you
after your flight, or did you discuss your flight with him?
No, but I did telephone Captain
Johnson, who was involved with the Antarctic flights, with the suggestion that
it would be a good idea to point out to future crews going on Antarctic
flights, that the McMurdo position on the flight plan was to the west of the
McMurdo TACAN co-ordinates, so they would carefully consider any normal across
track errors before rushing into a manual update over the McMurdo Base area.
Although I had been expecting to be going left of the R.NAV track when flying
visually on heading to track over the airfield area, I had been somewhat
surprised to see it as much as 28 miles left, when over the TACAN.” (MacFarlane p353)
The same matter was referred to in the March 1980 interview,
but in more detail:
“Could you tell us where you expected to approach, from what
direction, and over what area you expected to approach McMurdo and how you
discovered the error in the Area Nav System?
Well on the flight plans that were
handed out at the briefing, I had actually compared the co-ordinates of the
McMurdo Nav position on the Ross area chart in relation to the TACAN and
without measuring it as to how far it was west I did note that it appeared
close to the edge of the ice shelf, somewhat to the true west of McMurdo Base.
On the flight down from Cape Hallett, I was flying visually towards the Dry
Valley area noting that the Area Nav cross-track was going as expected up to
about 30 miles right of track, and from the Wright Valley we then headed
visually towards McMurdo Base, which we could see, and descending to 6000 feet
over the top of McMurdo. We closed the track and then proceeded to go left of
the Area Nav Track, and as the distance increased beyond 25 miles left as we
approached McMurdo, I made comment to my co-pilot that the area nav seemed to
be going excessively left of track. He agreed, he thought the same. So we
decided we would do a manual up-date as close as we could to overhead the TACAN
position. When the TACAN was reading one mile and we appeared visually over the
top, the co-pilot proceeded with the manual up-date, inserting the TACAN
co-ordinates. At that stage I was more concerned with flying the aircraft
visually than actually looking at the computer readout to see whether in fact
there was an error between the frozen co-ordinates and the TACAN co-ordinates
before the update. Later, on the climb back towards Cape Hallett when I was
able to relax more and think about the up-date, I thought that the Area Nav may
have been fairly right, and we did another manual up-date, just to make sure it
was correct for the flight back to New Zealand, overhead Coleman Island. I had
an extra flight plan printout which I had requested from Flight Despatch prior
to departure and when I got home I sat down and compared the computer McMurdo
position with the TACAN position on the chart, and decided, in actual fact, our
Area Nav was probably quite accurate at the McMurdo position, so the next
morning I rang Captain Ross Johnson, who had been mainly concerned with the
briefings and the organisation of the Antarctic flights, telling him that in my
opinion it would be a good idea to advise the subsequent crews going down to
Antarctica of the difference between the Area Nav McMurdo position and the
TACAN position, so they would considered carefully any cross-track errors that
they might note, before they rushed into manually updating their Area Nav.” (MacFarlane p357)
Everything in the above two statements is consistent with
Captain Simpson sighting the October 1977 print-out at the briefing, leading to
a belief, during his flight, that the waypoint was at McMurdo Station. There is
only one possible exception, that being the following sentence:
“Well on the flight plans that were
handed out at the briefing, I had actually compared the co-ordinates of the
McMurdo Nav position on the Ross area chart in relation to the TACAN and
without measuring it as to how far it was west I did note that it appeared
close to the edge of the ice shelf, somewhat to the true west of McMurdo Base.”
Captain Simpson used the phrase “McMurdo Base”. That is not
necessarily the same as “McMurdo Station”, given that different things were
located in different places. Note that in the first statement he used the
phrase “McMurdo Base” to refer to the area where a manual update would take
place. Given that the any manual update would be done using the TACAN, he was
using the phrase to refer to the airfield area, not McMurdo Station. He may
well have been using the phrase in the same way during the second interview. In
that interview, Captain Simpson also used the phrase “McMurdo Base” with “which
we could see”. Flying towards the McMurdo Station / Williams Field area, the
first thing a pilot would see would be the distinctive cross in the ice made by
the two intersecting runways. To demonstrate, look at the sixth page of the following document:
http://www.erebus.co.nz/Portals/4/Documents/articles/The%20Antarctic%20Experience%20-%20pdf%20of%20brochure.pdf
It's a large photograph looking down on Mount Erebus. The intersecting runways are in the distance.
It is more probable than not, therefore, that
Captain Simpson used the phrase “McMurdo Base” to refer to the location of the
airfield and the TACAN, and that when he referred to the “McMurdo Nav position”
he was referring to the co-ordinates of the NDB at McMurdo Station, shown on
the October 1977 print-out.
The Cause Of Captain Simpson’s Evidence
If the position of the McMurdo waypoint conveyed to Captain
Simpson during the briefing was at McMurdo Station, why did he give different
evidence?
It should be noted that Captain Simpson did not take any print-out
from the briefing. When he returned from his flight and plotted the waypoint,
he would have been puzzled as to why he had thought it was at McMurdo Station
but he was not able to go back and check the print-out he sighted at the
briefing because he did not have it.
If Captain Simpson did not know that the October 1977
print-out was available at the briefing then, as the days passed, he would have
come to assume that he must have been looking at one of Captain Wilson’s
print-outs. His mind would naturally seek to explain things by way of some
rational explanation. He would also be far more open than usual to suggestions as to how the contradictions
might be resolved.
Another Potential Cause: ALPA
At page 661 of MacFarlane’s book there is a quote from a ‘New
Zealand Wings’ article in June 1986:
“[Captain Simpson] told me that he
had written his statement for presentation to the Court and submitted it to
NZALPA’s lawyers. It eventually came back to the pilot for him to present to
the Court in a version which bore no resemblance to the one he had written. He
refused to present it in that form and re-wrote it in a manner which he
considered might be acceptable to NZALPA’s lawyers, but still represented the
facts as he knew them. After a while his statement came back, “doctored” yet
again. Yet again he re-wrote it. This back and forth process went on until the
version given at the hearing by this witness was not received by him until the
morning of the day he was scheduled to present his evidence. He wasn’t happy
with it but it was a lot closer to his original so, due to the time constraint,
he went ahead and presented it.”
MacFarlane then launches into Captain Simpson, ending on page
670 with a reference to allegedly inconsistent statements. Any perceived inconsistency
is explained by the scenario outlined above: At the briefing, Captain Simpson
sighted the October 1977 print-out, not one of Captain Wilson’s 1979
print-outs.
It is sometimes said of a person that “with friends like
that, who needs enemies?” MacFarlane is a perfect candidate, because in his strenuous
efforts on behalf of ALPA, he discloses information that has the opposite
effect.
By way of background, Air New Zealand conducted Antarctic
flights for three years: 1977, 1978 and 1979. In 1977 the waypoint was at 166
degrees. In 1978 and 1979, it was at 164 degrees, until being changed back just
before the accident flight.
ALPA’s case depended on Captain Simpson looking at a
print-out with a waypoint at 164 degrees and therefore depended on him looking
at a print-out from either 1978 or 1979. A print-out from 1977 was no good.
In his statement of March 1980, Captain Simpson used the
phrase “previous years flights” in reference to the print-out/s he sighted.
That phrase is slightly ambiguous but it could be interpreted as including both
1977 and 1978 and so including the October 1977 print-out. If, on the other
hand, the phrase was something like “a flight of the previous year” there would
be no ambiguity and the October 1977 print-out would be excluded.
At page 353 MacFarlane advises that a copy of Captain Simpson’s
March 1980 statement was given to ALPA’s lawyers.
At the bottom of page 662 MacFarlane refers to an interview
between Captain Simpson and ALPA’s lawyers, after which ALPA’s lawyers prepared a draft statement and posted it to
Captain Simpson.
At page 664 MacFarlane tells the reader that the draft
statement contained the following: “During the briefing Captain J.P. Wilson
produced a flight plan from a flight of
the previous year for our perusal.” (emphasis added)
Captain Simpson’s own words were “previous years flights”,
leaving open the possibility of his having sighted the October 1977 print-out.
ALPA’s lawyers had those words but instead of using them there was an apparently-minor change, which Captain
Simpson probably did not notice. The effect of that change was to lock Captain
Simpson into the desired position and exclude the possibility of his having
sighted the October 1977 print-out, thereby advancing ALPA’s case.
It would be interesting to know whether anyone at any time
ever raised with Captain Simpson the possibility that he might have actually sighted
the October 1977 print-out. I suspect not.