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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Twin engined large transport loses power to left engine after having severe compressor stalls. After conferring with maintenance and dispatch PIC elects to divert to dfw on reduced power. Felt that with partial power he was not in violation of the 'nearest suitable airport' ruling. Maintenance was a factor in choice of airport.
| Attributes | |
| ACN | 363595 |
| Time | |
| Date | 199703 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bro |
| State Reference | TX |
| Altitude | msl bound lower : 17000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : mmty tower : mso |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other descent other other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 8700 flight time type : 750 |
| ASRS Report | 363595 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Level at FL330 from zih to stl, approximately 1 1/2 hours into flight, #1 left engine began compressor stalling. Reduced power till stalls ceased. Advanced throttle on left engine and compressor stalls returned at approximately 1.2 EPR. Now considered aircraft to be single engine and asked monterey center for lower with right engine at maximum cruise and left at idle. We descended to FL230, then to 17000 ft. We contacted company and dispatch during this time for coordination. Now considering landing at nearest suitable airport (mcallen, tx). Company asked us if we could make sat or hou. With aircraft basically single engine, we needed to land at nearest suitable airport. Agreed to land at crp. Declared an emergency and headed for crp. While en route to crp we found compressor stall checklist and accomplished it. We were able to recover left engine to 1.5 EPR and felt with this power it would be safe to divert to dfw. Contacted company and dispatch and maintenance. Contacted center and notified them that we had recovered significant engine power on the left engine and were no longer an emergency, requested vectors to dfw. Approximately 45 mins later, landed at dfw without incident. Crash equipment stood by even though we told them we didn't need them. We secured left engine after landing.
Original NASA ASRS Text
Title: TWIN ENGINED LGT LOSES PWR TO L ENG AFTER HAVING SEVERE COMPRESSOR STALLS. AFTER CONFERRING WITH MAINT AND DISPATCH PIC ELECTS TO DIVERT TO DFW ON REDUCED PWR. FELT THAT WITH PARTIAL PWR HE WAS NOT IN VIOLATION OF THE 'NEAREST SUITABLE ARPT' RULING. MAINT WAS A FACTOR IN CHOICE OF ARPT.
Narrative: LEVEL AT FL330 FROM ZIH TO STL, APPROX 1 1/2 HRS INTO FLT, #1 L ENG BEGAN COMPRESSOR STALLING. REDUCED PWR TILL STALLS CEASED. ADVANCED THROTTLE ON L ENG AND COMPRESSOR STALLS RETURNED AT APPROX 1.2 EPR. NOW CONSIDERED ACFT TO BE SINGLE ENG AND ASKED MONTEREY CTR FOR LOWER WITH R ENG AT MAX CRUISE AND L AT IDLE. WE DSNDED TO FL230, THEN TO 17000 FT. WE CONTACTED COMPANY AND DISPATCH DURING THIS TIME FOR COORD. NOW CONSIDERING LNDG AT NEAREST SUITABLE ARPT (MCALLEN, TX). COMPANY ASKED US IF WE COULD MAKE SAT OR HOU. WITH ACFT BASICALLY SINGLE ENG, WE NEEDED TO LAND AT NEAREST SUITABLE ARPT. AGREED TO LAND AT CRP. DECLARED AN EMER AND HEADED FOR CRP. WHILE ENRTE TO CRP WE FOUND COMPRESSOR STALL CHKLIST AND ACCOMPLISHED IT. WE WERE ABLE TO RECOVER L ENG TO 1.5 EPR AND FELT WITH THIS PWR IT WOULD BE SAFE TO DIVERT TO DFW. CONTACTED COMPANY AND DISPATCH AND MAINT. CONTACTED CTR AND NOTIFIED THEM THAT WE HAD RECOVERED SIGNIFICANT ENG PWR ON THE L ENG AND WERE NO LONGER AN EMER, REQUESTED VECTORS TO DFW. APPROX 45 MINS LATER, LANDED AT DFW WITHOUT INCIDENT. CRASH EQUIP STOOD BY EVEN THOUGH WE TOLD THEM WE DIDN'T NEED THEM. WE SECURED L ENG AFTER LNDG.
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.