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B757 captain discovers that that the new QRH manual does not address restoring att and heading after an IRS failure.
| Attributes | |
| ACN | 966757 |
| Time | |
| Date | 201108 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZOA.ARTCC |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | INS / IRS / IRU |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 28000 Flight Crew Type 10400 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
In cruise flight; the left IRS failed; [so] we completed the QRH checklist. This new QRH does not address how to restore input to the attitude/heading indicators. Our old checklists did address switching to attitude mode. The new QRH is inadequate for this irregular procedure. This could lead to an accident; i.e. Not having attitude/heading indications.
Original NASA ASRS Text
Title: B757 Captain discovers that that the new QRH manual does not address restoring ATT and HDG after an IRS failure.
Narrative: In cruise flight; the left IRS failed; [so] we completed the QRH checklist. This new QRH does not address how to restore input to the attitude/heading indicators. Our old checklists did address switching to attitude mode. The new QRH is inadequate for this irregular procedure. This could lead to an accident; i.e. not having attitude/heading indications.
Data retrieved from NASA's ASRS site as of April 2012 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.