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NTSB Report
September 23, 1990 · Piper PA-12 · N2770M
Franconia, NH
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 23, 1990
Injury Outcomes
2 injuries (2 minor injuries), 1 uninjured
Location
Franconia, NH
Aircraft
Piper PA-12
Tail Number
N2770M
Operator
North Country Flying Service
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
NYC90LA228
THE AIRPLANE WAS ON A SIGHTSEEING TRIP CRUISING AT 1500' WHEN, ACCORDING TO THE PILOT, 'A BACKFIRE WAS HEARD AND THE AIRCRAFT EXPERIENCED PARTIAL POWER LOSS. SUFFICIENT POWER WAS NOT AVAILABLE FOR CONTINUED FLIGHT. AN EMERGENCY LANDING WAS MADE IN THE TREES.' A MAINTENANCE FACILITY EXAMINED THE ENGINE AND FOUND THE CENTER MUFFLER BAFFLE HAD BROKEN LOOSE AND HAD BLOCKED THE EXHAUST FLOW. THIS RESULTED IN A PARTIAL LOSS OF ENGINE POWER.
NTSB Probable Cause
THE LANDING OF THE AIRPLANE IN UNSUITABLE TERRAIN, DUE TO THE MECHANICAL FAILURE OF THE ENGINE CENTER MUFFLER BAFFLE, WHICH BLOCKED THE EXHAUST FLOW, RESULTING IN A LOSS OF POWER.
Full Narrative
THE AIRPLANE WAS ON A SIGHTSEEING TRIP CRUISING AT 1500' WHEN, ACCORDING TO THE PILOT, 'A BACKFIRE WAS HEARD AND THE AIRCRAFT EXPERIENCED PARTIAL POWER LOSS. SUFFICIENT POWER WAS NOT AVAILABLE FOR CONTINUED FLIGHT. AN EMERGENCY LANDING WAS MADE IN THE TREES.' A MAINTENANCE FACILITY EXAMINED THE ENGINE AND FOUND THE CENTER MUFFLER BAFFLE HAD BROKEN LOOSE AND HAD BLOCKED THE EXHAUST FLOW. THIS RESULTED IN A PARTIAL LOSS OF ENGINE POWER.
Flight
Event TypeAccident
Event Time10:30 EDT
Nearest AirportFranconia (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-12
Tail NumberN2770M
Aircraft CategoryAir
DamageSubstantial
OperatorNorth Country Flying Service
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-235 · Reciprocating · 100
Seats4
People & Injuries
Injury Summary2 injuries (2 minor injuries), 1 uninjured
Fatal0
Serious0
Minor2
Uninjured1
Total3
Crew 1Age 37 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO