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NTSB Report
August 6, 1984 · Mcdonnell Douglas DC-9-30 · N956VJ
Nashville, TN
Overview
Report Status
Preliminary report
Event Type
Incident
Date
August 6, 1984
Injury Outcomes
No injuries (85 uninjured)
Location
Nashville, TN
Aircraft
Mcdonnell Douglas DC-9-30
Tail Number
N956VJ
Injuries
None
Aircraft Damage
Minor
NTSB Number
ATL84IA246
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.
Full Narrative
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.
Flight
Event TypeIncident
Event Time13:05 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionIflt
Aircraft
AircraftMcdonnell Douglas DC-9-30
Tail NumberN956VJ
Aircraft CategoryAir
DamageMinor
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsP&W · JT8D-7B · Turbofan · 14000
People & Injuries
Injury SummaryNo injuries (85 uninjured)
Fatal0
Serious0
Minor0
Uninjured85
Total85
Crew 1First Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 8 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point66 F
Altimeter30.00 inHg
Observation Time17:49
Weather SourceWFAC