ASN Wikibase Occurrence # 378243
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| Date: | Thursday 18 October 1984 |
| Time: | 14:45 LT |
| Type: |  Boeing VC-137B (707-153) |
| Owner/operator: | USAF 89th Military Airlift Wing |
| Registration: | 58-6970 |
| MSN: | 17925 |
| Engine model: | P&W TF-33 |
| Fatalities: | Fatalities: 0 / Occupants: 49 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Seattle, WA -
 United States of America
|
| Phase: | Approach |
| Nature: | Military |
| Departure airport: | Spokane Airport, WA (GEG) |
| Seattle-Boeing Field International Airport, WA (BFI/KBFI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING ARRIVAL, A BOEING VC-137B-BN, USAF #58-6970, OPERATING AS AIR FORCE 2 (AF-2), WAS CLEARED FOR A LOCALIZER BACK- COURSE APCH. AT 1442:49, TRACON ADVISED AF-2 OF TRAFFIC AT ITS 10 O'CLOCK POSITION AT 2 MI, ALT UNKN. AT 1443:11, TRACON ADVISED AF-2 THE TRAFFIC HAD MOVED TO ITS 11 O-CLOCK POSITION AT 1-1/2 MI. AF-2 ACKNOWLEDGED BOTH TRANSMISSIONS. AT 1443:29, AF-2 ADVISED THAT THE FLT WAS CHANGING ITS FREQ TO BOEING TOWER. SHORTLY THEREAFTER, THE ACFT CMDR OF AF-2, SEATED IN THE RIGHT, SAW THE TRAFFIC, A MOONEY M20C, N6507U, ON A COLLISION COURSE. HE TOOK CONTROL & INITIATED EVASIVE ACTION. THE PLT OF N6507U WAS CRUISING AT 2,500 FT OUTSIDE THE SEATTLE TCA & DID NOT SEE AF-2, WHICH HAD CONVERGED FROM HIS RIGHT REAR AREA. THE MOONEY'S #1 RADIO WAS INOP & ITS #2 RADIO ANTENNA HAD BEEN VANDALIZED, THUS THE PLT WAS NOT IN RADIO CONTACT WITH ATC. THE LAST DIGIT/WHEEL ON HIS TRANSPONDER WAS STUCK ON '5' & CODE 1205 WAS BEING TRANSMITTED. THE TRANSPONDER HAD NO MODE 'C' ALT REPORTING CAPABILITY. ALL OF THE BACKCOURSE APCH WAS OUTSIDE THE TCA.
Findings
1. (F) COMMUNICATIONS - NOT POSSIBLE - PILOT OF OTHER AIRCRAFT
2. TRAFFIC ADVISORY - ISSUED - ATC PERSONNEL(DEP/APCH)
3. (C) VISUAL LOOKOUT - INADEQUATE - COPILOT/SECOND PILOT
4. (C) VISUAL LOOKOUT - DELAYED - PILOT IN COMMAND
5. REMEDIAL ACTION - PERFORMED - PILOT IN COMMAND
Accident investigation:
 |
|
Sources:
NTSB DCA85IA003
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 31-Mar-2024 06:27 | ASN Update Bot | Added |
| 31-Mar-2024 06:35 | ASN | Updated [Registration, Cn, Total occupants, Nature, Departure airport, Destination airport, Narrative] |
| 31-Mar-2024 06:35 | ASN | Updated [Operator] |
| 31-Mar-2024 06:37 | ASN | Updated [Aircraft type] |
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