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NTSB Report
August 8, 1992 · Piper PA-28R-201 · N6384C
Baltimore, MD
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 8, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Baltimore, MD
Aircraft
Piper PA-28R-201
Tail Number
N6384C
Operator
Warner E Mc Adam
Injuries
None
Aircraft Damage
Substantial
NTSB Number
NYC92LA149
THE PILOT EXPERIENCED A POWER LOSS AFTER TAKEOFF AT AN ALTITUDE OF 300 FEET AND DITCHED IN THE WATER. THE INVESTIGATION REVEALED A LOOSE RUBBER SEAL IN THE MECHANICAL FUEL PUMP WHICH BLOCKED FUEL FLOW OUT OF THE PUMP. THE ENGINEERING DRAWING FOR THE SEAL LACKED AN ASTM SPECIFICATION WHICH COVERS THE PRODUCTION OF THE RUBBER INCLUDING THE CURING. THE INVESTIGATION FOUND THAT WHEN SEALS PRODUCED FROM RUBBER WITHOUT THIS ASTM SPECIFICATION WERE EXPOSED TO AVIATION GASOLINE, THEY WOULD SWELL. WITH SUFFICIENT EXPOSURE TO GASOLINE, THE SEAL WILL COME UNSEATED AND FLOAT INTO THE EXHAUST SIDE OF THE PUMP, RESTRICTING FUEL FLOW TO THE ENGINE.
NTSB Probable Cause
A POWER LOSS DUE TO FUEL STARVATION FROM A FAULTY RUBBER SEAL IN THE MECHANICAL FUEL PUMP WHILE OPERATING OVER UNSUITABLE TERRAIN. AN ADDITIONAL CAUSE WAS THE USE OF INADEQUATE STANDARDS FOR THE PRODUCTION OF THE RUBBER SEAL.
Full Narrative
THE PILOT EXPERIENCED A POWER LOSS AFTER TAKEOFF AT AN ALTITUDE OF 300 FEET AND DITCHED IN THE WATER. THE INVESTIGATION REVEALED A LOOSE RUBBER SEAL IN THE MECHANICAL FUEL PUMP WHICH BLOCKED FUEL FLOW OUT OF THE PUMP. THE ENGINEERING DRAWING FOR THE SEAL LACKED AN ASTM SPECIFICATION WHICH COVERS THE PRODUCTION OF THE RUBBER INCLUDING THE CURING. THE INVESTIGATION FOUND THAT WHEN SEALS PRODUCED FROM RUBBER WITHOUT THIS ASTM SPECIFICATION WERE EXPOSED TO AVIATION GASOLINE, THEY WOULD SWELL. WITH SUFFICIENT EXPOSURE TO GASOLINE, THE SEAL WILL COME UNSEATED AND FLOAT INTO THE EXHAUST SIDE OF THE PUMP, RESTRICTING FUEL FLOW TO THE ENGINE.
Flight
Event TypeAccident
Event Time11:24 EDT
Nearest AirportMartin State (1nm SSE)
Runway14
Runway Length6996 ft
Runway Width180 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-28R-201
Tail NumberN6384C
Aircraft CategoryAir
DamageSubstantial
OperatorWarner E Mc Adam
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360-C1C6 · Reciprocating · 200
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 55 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 10 kt
Visibility5 sm
CeilingBroken clouds 3800 ft
Temperature / Dew Point64 F
Altimeter30.00 inHg
Observation Time15:24
Weather SourceWFAC