 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B757 captain reports terrain pull up warnings on final and assumed a GPWS error. He was later notified the altimeter was set incorrectly.
| Attributes | |
| ACN | 809647 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 1000 |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 180 flight time total : 18000 flight time type : 4000 |
| ASRS Report | 809647 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : published procedure non adherence : company policies other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
During our approach to runway 16R we received a 'terrain; terrain' warning followed by a 'pull up; pull up.' aircraft was in final approach confign and was stabilized. We ascertained that the GPWS was in error and continued the approach and landed uneventfully. We wrote up the GPWS and debriefed the crew. I received a call from the outbound captain advising me that all 3 altimeters were incorrectly set to 29.59 and should have been 30.59 which was no doubt the cause of the GPWS telling us to pull up. We did not level but if we had; we would have been about 900 ft low with that altimeter. Both the copilot and I did not set the altimeter correctly and I cannot recollect if that is what we heard from the controller or not. We should have doublechked it against the ATIS and we would have been sure.
Original NASA ASRS Text
Title: A B757 CAPT REPORTS TERRAIN PULL UP WARNINGS ON FINAL AND ASSUMED A GPWS ERROR. HE WAS LATER NOTIFIED THE ALTIMETER WAS SET INCORRECTLY.
Narrative: DURING OUR APCH TO RWY 16R WE RECEIVED A 'TERRAIN; TERRAIN' WARNING FOLLOWED BY A 'PULL UP; PULL UP.' ACFT WAS IN FINAL APCH CONFIGN AND WAS STABILIZED. WE ASCERTAINED THAT THE GPWS WAS IN ERROR AND CONTINUED THE APCH AND LANDED UNEVENTFULLY. WE WROTE UP THE GPWS AND DEBRIEFED THE CREW. I RECEIVED A CALL FROM THE OUTBOUND CAPT ADVISING ME THAT ALL 3 ALTIMETERS WERE INCORRECTLY SET TO 29.59 AND SHOULD HAVE BEEN 30.59 WHICH WAS NO DOUBT THE CAUSE OF THE GPWS TELLING US TO PULL UP. WE DID NOT LEVEL BUT IF WE HAD; WE WOULD HAVE BEEN ABOUT 900 FT LOW WITH THAT ALTIMETER. BOTH THE COPLT AND I DID NOT SET THE ALTIMETER CORRECTLY AND I CANNOT RECOLLECT IF THAT IS WHAT WE HEARD FROM THE CTLR OR NOT. WE SHOULD HAVE DOUBLECHKED IT AGAINST THE ATIS AND WE WOULD HAVE BEEN SURE.
Data retrieved from NASA's ASRS site as of May 2009 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.