ASN Wikibase Occurrence # 378775
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| Date: | Monday 6 August 1984 |
| Time: | 13:05 LT |
| Type: |  McDonnell Douglas DC-9-31 |
| Owner/operator: | USAir |
| Registration: | N956VJ |
| MSN: | 47588/699 |
| Engine model: | P&W JT8D-7B |
| Fatalities: | Fatalities: 0 / Occupants: 85 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Nashville, TN -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Nashville, TN (KBNA) |
| Pittsburgh International Airport, PA (PIT/KPIT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING THE CLIMB-OUT, A 15% DECREASE IN THE RIGHT ENG EPR WAS NOTED BY THE FLT CREW. THIS WAS FOLLOWED BY A LOUD BANG & FAILURE OF THE #2 ENG. THE #2 ENG WAS SHUT DOWN & THE ACFT WAS FLOWN BACK TO THE DEPARTURE ARPT. AN INITIAL EXAM REVEALED THAT THE RIGHT ENG TOP COWLING HAD SEPARATED & THE LOWER SECTION OF THE COMBUSTION CASE WAS SPLIT. ENG REMOVAL & TEARDOWN REVEALED THE #5 FUEL NOZZLE NUT LOCK RING WAS MIS-ASSEMBLED. THIS DETRACTED FROM THE TORQUE ON THE FUEL NOZZLE NUT & INADEQUATELY COMPRESSED THE #5 FUEL NOZZLE SEAL. SUBSEQUENTLY, THE FUEL NOZZLE LEAKED & ALLOWED LOCAL OVERTEMP OF THE OUTER COMBUSTION CHAMBER CASE AT THE 6 O'CLOCK POSITION.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB ATL84IA246
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 31-Mar-2024 12:15 | ASN Update Bot | Added |
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