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NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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September 15, 1982 · Piper PA-34-22OT · N220HB

Montgomery, AL

Overview

Report Status
Preliminary report
Event Type
Incident
Date
September 15, 1982
Injury Outcomes
No injuries (2 uninjured)
Location
Montgomery, AL
Aircraft
Piper PA-34-22OT
Tail Number
N220HB
Operator
Montgomery Aviation
Injuries
None
Aircraft Damage
Minor
NTSB Number
ATL82IA281

THE PILOT STATED THAT A NORMAL RUNUP WAS COMPLETED BEFORE TAKEOFF. DURING THE TAKEOFF ROLL, THE AIRCRAFT ACCELE- RATED THROUGH 75 KNOTS WHEN A LOUD BANG WAS HEARD FROM THE LEFT SIDE. THE TAKEOFF WAS ABORTED AND A ROLLOUT ACCOMPLISHED. EXAMINATION OF THE LEFT ENGINE REVEALED THAT ONE OF THREE LEFT PROPELLER COUNTERWEIGHTS WERE MISSING. EACH COUNTERWEIGHT IS SECURED BY A SINGLE BOLT AND LOCKING NUT. EXAMINATION OF THE BOLT TUB REVEALED EVIDENCE OF PRE-LOAD STRESS. A SERVICE BULLETIN WAS ISSUED ON MARCH 03 1982, STATING THAT TO REDUCE PRE-LOAD STRESS ON THE COUNTERWEIGHT BOLT, THE TORQUE SPECIFICATION HAS BEEN REDUCED FROM 105-100 FOOT POUNDS TO 65-60 TORQUE POUNDS.

Full Narrative

THE PILOT STATED THAT A NORMAL RUNUP WAS COMPLETED BEFORE TAKEOFF. DURING THE TAKEOFF ROLL, THE AIRCRAFT ACCELE- RATED THROUGH 75 KNOTS WHEN A LOUD BANG WAS HEARD FROM THE LEFT SIDE. THE TAKEOFF WAS ABORTED AND A ROLLOUT ACCOMPLISHED. EXAMINATION OF THE LEFT ENGINE REVEALED THAT ONE OF THREE LEFT PROPELLER COUNTERWEIGHTS WERE MISSING. EACH COUNTERWEIGHT IS SECURED BY A SINGLE BOLT AND LOCKING NUT. EXAMINATION OF THE BOLT TUB REVEALED EVIDENCE OF PRE-LOAD STRESS. A SERVICE BULLETIN WAS ISSUED ON MARCH 03 1982, STATING THAT TO REDUCE PRE-LOAD STRESS ON THE COUNTERWEIGHT BOLT, THE TORQUE SPECIFICATION HAS BEEN REDUCED FROM 105-100 FOOT POUNDS TO 65-60 TORQUE POUNDS.

Flight

Event TypeIncident
Event Time09:20 CDT
Nearest AirportDannelly Field (0nm N)
Runway27
Runway Length9000 ft
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA-34-22OT
Tail NumberN220HB
Aircraft CategoryAir
DamageMinor
OperatorMontgomery Aviation
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · TSIO-360-KB · Reciprocating · 220
Seats7

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 65 · Second Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
Visibility15 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0

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Appendix: Source Data