Air carrier large transport fgt suffers a bird strike in a night operation. After a cursory postflt ...

Attributes
ACN	240050
Time
Date	199304
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sau airport : oak
State Reference	CA
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 115 flight time total : 14000 flight time type : 3500
ASRS Report	240050
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical inflight encounter other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

While on descent into oakland on the night of apr/xx/93 the aircraft hit a bird (I believe it is a seagull). At the time, we were level at 7000 ft MSL approximately 10 mi north of the sausalito VOR. After landing in oakland we inspected the aircraft for damage. During our inspection we found evidence of the bird strike on the left side of the aircraft. The bird appeared to strike the pitot tube and then travel aft to strike the wing breaking into at least 3 pieces. At least 1 piece of the bird went into the #1 engine. Our preliminary investigation found no visible damage to the engine. After discussion with maintenance, we decided to continue to our final destination. In seattle, a through inspection revealed a damaged second stage of the compressor section. The corrective action was to replace the compressor section. Human performance and perceptions: we only inspected the first stage and exhaust stage blades on our initial inspection in oakland because we assumed that it would show the damage there first. We saw no damage other than feathers on 1 inlet guide vane and felt no other inspection was necessary. We continued the flight to destination based on this assumption. Although there was no visible damage, it might be better to ground the aircraft until maintenance can borescope the engine.

Original NASA ASRS Text

Title: ACR LGT FGT SUFFERS A BIRD STRIKE IN A NIGHT OP. AFTER A CURSORY POSTFLT INSPECTION AT DEST ARPT, CONTINUES ON TO ULTIMATE DEST. (MOST LIKELY A DUCK, AS GULLS DON'T FLY THAT HIGH AT NIGHT).

Narrative: WHILE ON DSCNT INTO OAKLAND ON THE NIGHT OF APR/XX/93 THE ACFT HIT A BIRD (I BELIEVE IT IS A SEAGULL). AT THE TIME, WE WERE LEVEL AT 7000 FT MSL APPROX 10 MI N OF THE SAUSALITO VOR. AFTER LNDG IN OAKLAND WE INSPECTED THE ACFT FOR DAMAGE. DURING OUR INSPECTION WE FOUND EVIDENCE OF THE BIRD STRIKE ON THE L SIDE OF THE ACFT. THE BIRD APPEARED TO STRIKE THE PITOT TUBE AND THEN TRAVEL AFT TO STRIKE THE WING BREAKING INTO AT LEAST 3 PIECES. AT LEAST 1 PIECE OF THE BIRD WENT INTO THE #1 ENG. OUR PRELIMINARY INVESTIGATION FOUND NO VISIBLE DAMAGE TO THE ENG. AFTER DISCUSSION WITH MAINT, WE DECIDED TO CONTINUE TO OUR FINAL DEST. IN SEATTLE, A THROUGH INSPECTION REVEALED A DAMAGED SECOND STAGE OF THE COMPRESSOR SECTION. THE CORRECTIVE ACTION WAS TO REPLACE THE COMPRESSOR SECTION. HUMAN PERFORMANCE AND PERCEPTIONS: WE ONLY INSPECTED THE FIRST STAGE AND EXHAUST STAGE BLADES ON OUR INITIAL INSPECTION IN OAKLAND BECAUSE WE ASSUMED THAT IT WOULD SHOW THE DAMAGE THERE FIRST. WE SAW NO DAMAGE OTHER THAN FEATHERS ON 1 INLET GUIDE VANE AND FELT NO OTHER INSPECTION WAS NECESSARY. WE CONTINUED THE FLT TO DEST BASED ON THIS ASSUMPTION. ALTHOUGH THERE WAS NO VISIBLE DAMAGE, IT MIGHT BE BETTER TO GND THE ACFT UNTIL MAINT CAN BORESCOPE THE ENG.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Air carrier large transport fgt suffers a bird strike in a night operation. After a cursory postflt inspection at destination airport, continues on to ultimate destination. (Most likely a duck, as gulls don't fly that high at night).