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NTSB Report
October 13, 1992 · Mcdonnell Douglas DC-9-82 · N72822
Denver, CO
Overview
Report Status
Probable Cause
Event Type
Incident
Date
October 13, 1992
Injury Outcomes
No injuries (88 uninjured)
Location
Denver, CO
Aircraft
Mcdonnell Douglas DC-9-82
Tail Number
N72822
Operator
Continental Airlines
Injuries
None
Aircraft Damage
Minor
NTSB Number
DEN93IA005
WHILE IN CRUISE FLIGHT, THE 'RIGHT REVERSER ACCUMULATOR LOW' CAUTION LIGHT ILLUMINATED. EXAMINATION FOLLOWING LANDING REVEALED THAT THE AUXILIARY POWER UNIT (APU) TURBINE WHEEL HAD SEPARATED IN AN UNCONTAINED FAILURE, AND HAD DAMAGED NUMEROUS COMPONENTS IN THE COMPARTMENT BELOW THE NUMBER TWO ENGINE PYLON. THE APU HAD BEEN PLACARDED AS INOPERATIVE TWO DAYS PRIOR TO THE INCIDENT. THE INVESTIGATION DID NOT REVEAL WHEN AN INADVERTENT ATTEMPT TO START THE APU HAD OCCURRED, BUT DID REVEAL THAT NO PROCEDURES, OTHER THAN THE INOPERATIVE PLACARD, WERE IN PLACE TO PREVENT START ATTEMPTS.
NTSB Probable Cause
AN INADVERTENT ATTEMPT, BY UNKNOWN PERSONS, TO START THE APU WHICH HAD BEEN PLACARDED AS INOPERATIVE. FACTORS WERE: INADEQUATE PROCEDURES IN RENDERING THE APU INCAPABLE OF BEING STARTED WHEN INOPERATIVE.
Full Narrative
WHILE IN CRUISE FLIGHT, THE 'RIGHT REVERSER ACCUMULATOR LOW' CAUTION LIGHT ILLUMINATED. EXAMINATION FOLLOWING LANDING REVEALED THAT THE AUXILIARY POWER UNIT (APU) TURBINE WHEEL HAD SEPARATED IN AN UNCONTAINED FAILURE, AND HAD DAMAGED NUMEROUS COMPONENTS IN THE COMPARTMENT BELOW THE NUMBER TWO ENGINE PYLON. THE APU HAD BEEN PLACARDED AS INOPERATIVE TWO DAYS PRIOR TO THE INCIDENT. THE INVESTIGATION DID NOT REVEAL WHEN AN INADVERTENT ATTEMPT TO START THE APU HAD OCCURRED, BUT DID REVEAL THAT NO PROCEDURES, OTHER THAN THE INOPERATIVE PLACARD, WERE IN PLACE TO PREVENT START ATTEMPTS.
Flight
Event TypeIncident
Event Time20:01 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMcdonnell Douglas DC-9-82
Tail NumberN72822
Aircraft CategoryAir
DamageMinor
OperatorContinental Airlines
Operating RulePart 121
Engines2
Engine TypeTurbojet
Engine DetailsP&W · JT8D-217A · Turbojet · 20000
Seats160
People & Injuries
Injury SummaryNo injuries (88 uninjured)
Fatal0
Serious0
Minor0
Uninjured88
Total88
Crew 1Age 45 · First Class
Conditions
ConditionsVMC
LightBright Night
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO