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19990224013939I

Incident
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FAA incident report · Doug DC3 · San Bernadino, CA · February 24, 1999

FAA Aviation Safety Information Portal

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Date
February 24, 1999 · 08:15 local
Place
San Bernadino, CA
Airport
Norton Afb
Phase of flight
Forced/Precautionary Landing
Operating rules
General operating rules (Part 91)
Aircraft
N92578
Reported as
Doug DC3
Reported engine
Pratt & Whitney R183075
People aboard
2
Fatal injuries
0
Pilot’s flight hours
26,000 total6,000 in this make and model60 in the last 90 days
N92578Registered now · Douglas DC3C 1830-94S/N 9028 · Built 1943Airframe modelDouglas DC3C 1830-94Engine modelPratt & Whitney R-1830 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-5)Immediately after takeoff from the san bernardino airport (sbd) at approximately 500 feet AGL, the left engine started backfiring through the carburetor. The engine was shut down and the aircraft safely returned to sbd with no further incident. The cause of the backfiring was investigated by maintenance personnel at santa barbara aerospace, san bernardino. Their findings revealed that the exhaust push rod for the number 7 cylinder broke approxiamtely two inches from the bottom of the rod. This incident on this engine occurred with 631.5 hours since overhaul. A malfunction or defect report was initiated for reporting purposes. The engine was repaired and the aircraft returned to service.

As the FAA filed it

(-5)IMMEDIATELY AFTER TAKEOFF FROM THE SAN BERNARDINO AIRPORT (SBD) AT APPROXIMATELY 500 FEET AGL, THE LEFT ENGINE STARTED BACKFIRING THROUGH THE CARBURETOR. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT SAFELY RETURNED TO SBD WITH NO FURTHER INCIDENT. THE CAUSE OF THE BACKFIRING WAS INVESTIGATED BY MAINTENANCE PERSONNEL AT SANTA BARBARA AEROSPACE, SAN BERNARDINO. THEIR FINDINGS REVEALED THAT THE EXHAUST PUSH ROD FOR THE NUMBER 7 CYLINDER BROKE APPROXIAMTELY TWO INCHES FROM THE BOTTOM OF THE ROD. THIS INCIDENT ON THIS ENGINE OCCURRED WITH 631.5 HOURS SINCE OVERHAUL. A MALFUNCTION OR DEFECT REPORT WAS INITIATED FOR REPORTING PURPOSES. THE ENGINE WAS REPAIRED AND THE AIRCRAFT RETURNED TO SERVICE.