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NTSB Report
July 9, 1984 · Boeing B-737-222 · N9015U
Portland, OR
Overview
Report Status
Preliminary report
Event Type
Incident
Date
July 9, 1984
Injury Outcomes
No injuries (71 uninjured)
Location
Portland, OR
Aircraft
Boeing B-737-222
Tail Number
N9015U
Injuries
None
NTSB Number
SEA84IA168
AFTER TAKEOFF, THE ACFT WAS CLIMBING THRU ABOUT 4000 FT WHEN THE APU FIRE WARNING LIGHT ILLUMINATED. THE FLT CREW DISCHARGED THE FIRE EXTINGUISHING UNITS & REQUESTED AN EMERGENCY LANDING. A TEARDOWN OF THE APU REVEALED EVIDENCE THAT A HARD OBJECT WAS INJESTED INTO THE 1ST STAGE COMPRESSOR IMPELLER, BENDING 2 OF THE BLADES. THE OBJECT CONTINUED THRU THE ENG & IMPACTED THE EXDUCER BLADE. THE BLADE FAILED AT A CRACK & PENETRATED THE EXHAUST PIPE ASSEMBLY. HOT GASES THEN VENTED INTO THE COOLING AIR PASSAGE & OVERHEATED THE TAIL CONE & AFT PORTION OF THE APU.
Full Narrative
AFTER TAKEOFF, THE ACFT WAS CLIMBING THRU ABOUT 4000 FT WHEN THE APU FIRE WARNING LIGHT ILLUMINATED. THE FLT CREW DISCHARGED THE FIRE EXTINGUISHING UNITS & REQUESTED AN EMERGENCY LANDING. A TEARDOWN OF THE APU REVEALED EVIDENCE THAT A HARD OBJECT WAS INJESTED INTO THE 1ST STAGE COMPRESSOR IMPELLER, BENDING 2 OF THE BLADES. THE OBJECT CONTINUED THRU THE ENG & IMPACTED THE EXDUCER BLADE. THE BLADE FAILED AT A CRACK & PENETRATED THE EXHAUST PIPE ASSEMBLY. HOT GASES THEN VENTED INTO THE COOLING AIR PASSAGE & OVERHEATED THE TAIL CONE & AFT PORTION OF THE APU.
Flight
Event TypeIncident
Event Time14:15 PDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing B-737-222
Tail NumberN9015U
Aircraft CategoryAir
Operating RulePart 121
Engines2
Engine TypeTurbojet
Engine DetailsP&W · JT8D-17 · Turbojet · 16000
Seats115
People & Injuries
Injury SummaryNo injuries (71 uninjured)
Fatal0
Serious0
Minor0
Uninjured71
Total71
Crew 1Age 53 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind310° @ 5 kt
Visibility25 sm
CeilingNone
Temperature / Dew Point70 F / 54
Altimeter30.00 inHg
Observation Time20:50
Weather SourceWFAC