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Reporter questions the lack of guidance from the FAA when flying in very cold temperatures in mountainous terrain.
| Attributes | |
| ACN | 238534 |
| Time | |
| Date | 199304 |
| Day | Fri |
| Place | |
| Locale Reference | airport : yxy |
| State Reference | FO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Aircraft 1 | |
| Controlling Facilities | tower : phx |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time total : 23000 |
| ASRS Report | 238534 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
I will freely admit that I don't come close to knowing all the answers, but usually I know where to go to find the answers. I am stumped. I have asked the gurus of instrument procedures at my airline for an explanation of the note on the enclosed approach to whitehorse. They have no satisfactory explanation. I know that extreme low temperatures can affect altimeters to what I thought was a small amount. I have flown into airports such as missoula and helena, mt, there are no corrections needed there. Fairbanks, ak, is another airport without cold temperature corrections. What does this note really mean? Why the large corrections? Callback conversation with reporter revealed the following: reporter reiterated that he couldn't understand why there was such a problem with cold temperatures in canada and yet the FAA finds it unimportant even in places like montana and alaska.
Original NASA ASRS Text
Title: RPTR QUESTIONS THE LACK OF GUIDANCE FROM THE FAA WHEN FLYING IN VERY COLD TEMPS IN MOUNTAINOUS TERRAIN.
Narrative: I WILL FREELY ADMIT THAT I DON'T COME CLOSE TO KNOWING ALL THE ANSWERS, BUT USUALLY I KNOW WHERE TO GO TO FIND THE ANSWERS. I AM STUMPED. I HAVE ASKED THE GURUS OF INST PROCS AT MY AIRLINE FOR AN EXPLANATION OF THE NOTE ON THE ENCLOSED APCH TO WHITEHORSE. THEY HAVE NO SATISFACTORY EXPLANATION. I KNOW THAT EXTREME LOW TEMPS CAN AFFECT ALTIMETERS TO WHAT I THOUGHT WAS A SMALL AMOUNT. I HAVE FLOWN INTO ARPTS SUCH AS MISSOULA AND HELENA, MT, THERE ARE NO CORRECTIONS NEEDED THERE. FAIRBANKS, AK, IS ANOTHER ARPT WITHOUT COLD TEMP CORRECTIONS. WHAT DOES THIS NOTE REALLY MEAN? WHY THE LARGE CORRECTIONS? CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR REITERATED THAT HE COULDN'T UNDERSTAND WHY THERE WAS SUCH A PROB WITH COLD TEMPS IN CANADA AND YET THE FAA FINDS IT UNIMPORTANT EVEN IN PLACES LIKE MONTANA AND ALASKA.
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.