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Air carrier heavy transport unable to maintain clearance altitude after left engine was shut down. ARTCC clearance to lower altitude delayed by frequency congestion.
| Attributes | |
| ACN | 162873 |
| Time | |
| Date | 199011 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lin |
| State Reference | CA |
| Altitude | msl bound lower : 40600 msl bound upper : 41000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : j84 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 900 |
| ASRS Report | 162873 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Flight departed sfo bound VOR stl. Clearance was by sfo 4 departure lin filed route maintain FL230. Subsequent FL410. As the aircraft leveled at FL410 it became necessary to shut the left engine down. Before oakland center could be contacted for clearance to a lower level, the aircraft lost approximately 300-400'. Once the center was contacted immediate clearance was given to FL370 then to FL290. Heavy center communication made clearance delivery very difficult. Subsequent aircraft handling and clearance requests were normal and very prompt.
Original NASA ASRS Text
Title: ACR HVT UNABLE TO MAINTAIN CLRNC ALT AFTER LEFT ENGINE WAS SHUT DOWN. ARTCC CLRNC TO LOWER ALT DELAYED BY FREQ CONGESTION.
Narrative: FLT DEPARTED SFO BOUND VOR STL. CLRNC WAS BY SFO 4 DEP LIN FILED RTE MAINTAIN FL230. SUBSEQUENT FL410. AS THE ACFT LEVELED AT FL410 IT BECAME NECESSARY TO SHUT THE L ENG DOWN. BEFORE OAKLAND CTR COULD BE CONTACTED FOR CLRNC TO A LOWER LEVEL, THE ACFT LOST APPROX 300-400'. ONCE THE CTR WAS CONTACTED IMMEDIATE CLRNC WAS GIVEN TO FL370 THEN TO FL290. HVY CTR COM MADE CLRNC DELIVERY VERY DIFFICULT. SUBSEQUENT ACFT HANDLING AND CLRNC REQUESTS WERE NORMAL AND VERY PROMPT.
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.