TNAG-2856-FCO40-4109-Hong-Kong-compensation-claim-regarding-Korean-Air-Lines-Flig-1993 — Page 86

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1.10.2.4 Within Tokyo FIR traffic was controlled by Tokyo ACC, Sapporo ACC and Fukuoka ACC. Traffic along the route for which KE 007 received its ATC clearance was controlled by Tokyo ACC, until the transfer to Taegu ACC (Republic of Korea). Until westbound traffic on R20 was within the coverage of the extended range VHF air-ground communication station at Sendai, two-way communications were conducted on HF by Tokyo Radio.

1.10.3

1.10.3.1

Air traffic control service

At 08:47 hours, the filed flight plan message was transmitted by Anchorage FSS/IFSS to all ATS units along the route of flight, the addressees being added automatically on the basis of a stored list, taking account of aircraft identification and the planned route of the flight. The ETD in the flight plan was 13:00 hours.

1.10.3.2 At 12:50 hours KE 007 received its clearance to Seoul via the Anchorage SID No. 8, thence via its flight plan route at cruising level FL 310 and with an assigned secondary surveillance radar (SSR) transponder code of 6072. KE 007 received push-back clearance at 12:51 hours and taxi clearance at 12:55 hours followed by clearance for take-off from runway 32 at 12:58 hours. The aircraft was airborne at 13:00 hours and after radar contact was established, clearance was given to climb to FL 310 on heading 220° and to proceed direct to Bethel VORTAC when able. Transfer of radar control to Anchorage ARTCC was effected at 13:04 hours.

1.10.3.3 Shortly after radar transfer KE 007 reported leaving 5 000 ft climbing to FL 310. Radar control of westbound flights was provided until leaving the coverage of the Kenai air route surveillance radar, some 160 NM from Anchorage, approximately at Cairn Mountain NDB. Radar service was terminated at 13:27 hours and control of the aircraft was transferred to the combined non-radar control sectors D 2/3 (Anchorage ARTCC on 125.2 MHz) shortly before radar contact was lost. At 13:28 hours KE 007 reported leaving FL 300 climbing to FL 310 and at 13:49 hours reported passing BETHEL maintaining FL 310 and estimating NABIE at 14:30 hours. At 13:50 hours Anchorage ARTCC requested KE 007 to report NABIE on 127.8 MHz. The request was acknowledged by KE 007.

1.10.3.4

At 14:32 hours, two minutes after the estimated time over NABIE, the controller at combined sectors D 10/11 tried to establish communications with KE 007 on 127.8 MHz (St. Paul RCAG). When these efforts failed, the controller requested the Anchorage IFSS to contact KE 007 and request the aircraft to contact Anchorage ARTCC on VHF. At 14:35 hours, KE 015 relayed KE 007's report of passing NABIE at 14:32 hours maintaining FL 310 and estimating NEEVA at 15:49 hours. ARTCC subsequently requested KE 015 to relay an instruction to KE 007 to report over NEEVA on 128.2 MHz (Shemya RCAG).

1.10.3.5

At 14:44 hours KE 007 contacted Anchorage Radio on HF and transmitted its position report for NABIE. It also gave a revised ETA for NEEVA of 15:53 hours and requested FL 330. Anchorage Radio advised KE 007 to make the request for FL 330 on 127.8 MHz (St. Paul RCAG).

1.10.3.6

At 16:00 hours KE 015 relayed to ARTCC the position report from KE 007 for NEEVA at 15:58 hours maintaining FL 310 and estimating NIPPI at 17:08 hours. KE 015 was asked to relay a request to KE 007 to report NIPPI to Anchorage Radio.