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Flight crew of an large transport exceeded the engine idle start limit time during starting after aircraft was overnight cold soaked in canada.
| Attributes | |
| ACN | 291653 |
| Time | |
| Date | 199412 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : yyz |
| State Reference | ON |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 9400 flight time type : 1000 |
| ASRS Report | 291653 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
The right engine had been written up as being very slow to reach idle during start. Maintenance had said that it had been due to cold soaking, and that it started normally next time. With this information in mind we anticipated a slow start since the engine had cold soaked overnight in near-freezing WX. We started the engine and monitored it closely for any engine (exceeded limits). None occurred. But the engine took nearly 3 mins to reach idle. However, the maximum time allowed to reach idle is 90 seconds. The checklist says we should have discontinued the start at 90 seconds. We wrote it up once again and maintenance inspected it at the next stop and determined that no damage occurred and allowed it to continue.
Original NASA ASRS Text
Title: FLC OF AN LGT EXCEEDED THE ENG IDLE START LIMIT TIME DURING STARTING AFTER ACFT WAS OVERNIGHT COLD SOAKED IN CANADA.
Narrative: THE R ENG HAD BEEN WRITTEN UP AS BEING VERY SLOW TO REACH IDLE DURING START. MAINT HAD SAID THAT IT HAD BEEN DUE TO COLD SOAKING, AND THAT IT STARTED NORMALLY NEXT TIME. WITH THIS INFO IN MIND WE ANTICIPATED A SLOW START SINCE THE ENG HAD COLD SOAKED OVERNIGHT IN NEAR-FREEZING WX. WE STARTED THE ENG AND MONITORED IT CLOSELY FOR ANY ENG (EXCEEDED LIMITS). NONE OCCURRED. BUT THE ENG TOOK NEARLY 3 MINS TO REACH IDLE. HOWEVER, THE MAX TIME ALLOWED TO REACH IDLE IS 90 SECONDS. THE CHKLIST SAYS WE SHOULD HAVE DISCONTINUED THE START AT 90 SECONDS. WE WROTE IT UP ONCE AGAIN AND MAINT INSPECTED IT AT THE NEXT STOP AND DETERMINED THAT NO DAMAGE OCCURRED AND ALLOWED IT TO CONTINUE.
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.