TNAG-2856-FCO40-4109-Hong-Kong-compensation-claim-regarding-Korean-Air-Lines-Flig-1993 — Page 112

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These were specific route identifiers for a teletype request for a computer flight plan; both had been added by the flight dispatcher. The fuel table was crossed out because it had to be revised to take account of the actual take-off mass and holding fuel. The remaining annotations against the text of the flight plan, other than the waypoint numbers 1 to 9, were made in the Korean Air Lines' Anchorage office during the alert and distress phases as information became available and the possibilities were evaluated following the loss of communication with KE 007.

2.1.5

Apparently the only annotations that may have been made by the flight crew of KE 007 were those indicating waypoint numbers from 1 to 9. None of the copies available was an exact reproduction of the document taken by the flight crew for use during the flight to Seoul.

2.2

2.2.1

Deferred defect

The aircraft arrived in Anchorage with a defect in the No. 2 compass system. The defect was noted in the maintenance record. It produced a heading warning flag on the first officer's horizontal situation indicator (HSI) and caused the central instrument warning system (CIWS) lights to flash. In such a fault condition, fail flags should also have shown on the first officer's VOR radio magnetic indicator (RMI) and the captain's ADF RMI but these were not indicated in the maintenance record. These warning lights and flags could be cancelled or cleared by selecting the compass system selector switch on the captain's panel to CAPT 1/FO 1. The maintenance record showed that this action was taken. The indicator light adjacent to the selector would then have remained lit to show that compass information to each pilot's instruments was provided by the No. 1 compass system. This defect was deferred for rectification in Seoul.

2.2.2

The existence of such a defect in one of the compass systems could be expected to promote a more than normal vigilance by the flight crew in monitoring the performance of the navigation systems and the navigation of the flight.

2.3

Clearance, taxi and departure

2.3.1

KE 007 was cleared for an Anchorage SID No. 8 departure and assigned SSR code 6072. Take-off was at 13:00 hours. At 13:01 hours KE 007 was cleared to climb to and to maintain FL 310, and was instructed to turn left onto a heading of 220° magnetic. The DFDR record started 5 minutes 18 seconds prior to lift-off and showed heading changes commensurate with the taxi route from gate N2 to line up on runway 32. The DFDR record showed the take-off on a magnetic heading of 320°. The left turn to 220° was commenced 23 seconds after lift-off and completed 1 minute 50 seconds after lift- off. Autopilot A was selected to Command mode 2 minutes 10 seconds after lift-off.

2.3.2

At 13:02:08 hours Anchorage APP cleared KE 007 to proceed "direct BETHEL when able". Korean Air personnel indicated that Anchorage VOR/DME would have been inserted as waypoint 1. This matched the annotation on the operational flight plan, which further indicated that Cairn Mountain NDB was inserted as waypoint 2, and Bethel VORTAC as waypoint 3.