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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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The captain heard the controller say 'maintain 4000 ft until established on the ILS and cleared for the ILS approach runway 21.' the reporter, the first officer flying heard the captain read back 4000 ft. The controller seeing the flight crew descend through 4500 said they were to maintain 5000 ft. The reporter said they heard 4000 ft and read back 4000 ft but were climbing back to 5000 ft. The ILS was completed with no further problems.
| Attributes | |
| ACN | 325920 |
| Time | |
| Date | 199601 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : geg |
| State Reference | WA |
| Altitude | msl bound lower : 4500 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : geg |
| Operator | common carrier : air carrier |
| Make Model Name | SA-227 AC Metro III |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10800 flight time type : 2500 |
| ASRS Report | 325920 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On the flight from gtf to geg it was my leg and the captain was working the radios. We were getting vectored to intercept the ILS inbound and the GS intercept altitude is 4000 ft MSL. We were using ILS runway 21. In the previous 1500 ft the nose gear started cycling by itself, and I was preoccupied with that problem when ATC gave us the heading to intercept the ILS and maintain 5000 ft until established and cleared for the approach. I did not hear the altitude but did hear that we were cleared for the approach and did hear captain read back maintain 4000 ft and cleared for the approach and the captain set 4000 ft in the altitude alerter. We were going through the landing checklist, intercepting the ILS and descending through 4500 ft when ATC said that we were to maintain 5000 ft. The captain told ATC he read back 4000 ft, while I climbed back to 5000 ft and intercepted the GS and flew it down to landing. The thing that I could of done different is challenged the captain since I did not hear the altitude myself or ask ATC to confirm it or ask the captain to ask ATC to confirm the altitude.
Original NASA ASRS Text
Title: THE CAPT HEARD THE CTLR SAY 'MAINTAIN 4000 FT UNTIL ESTABLISHED ON THE ILS AND CLRED FOR THE ILS APCH RWY 21.' THE RPTR, THE FO FLYING HEARD THE CAPT READ BACK 4000 FT. THE CTLR SEEING THE FLC DSND THROUGH 4500 SAID THEY WERE TO MAINTAIN 5000 FT. THE RPTR SAID THEY HEARD 4000 FT AND READ BACK 4000 FT BUT WERE CLBING BACK TO 5000 FT. THE ILS WAS COMPLETED WITH NO FURTHER PROBS.
Narrative: ON THE FLT FROM GTF TO GEG IT WAS MY LEG AND THE CAPT WAS WORKING THE RADIOS. WE WERE GETTING VECTORED TO INTERCEPT THE ILS INBOUND AND THE GS INTERCEPT ALT IS 4000 FT MSL. WE WERE USING ILS RWY 21. IN THE PREVIOUS 1500 FT THE NOSE GEAR STARTED CYCLING BY ITSELF, AND I WAS PREOCCUPIED WITH THAT PROB WHEN ATC GAVE US THE HEADING TO INTERCEPT THE ILS AND MAINTAIN 5000 FT UNTIL ESTABLISHED AND CLRED FOR THE APCH. I DID NOT HEAR THE ALT BUT DID HEAR THAT WE WERE CLRED FOR THE APCH AND DID HEAR CAPT READ BACK MAINTAIN 4000 FT AND CLRED FOR THE APCH AND THE CAPT SET 4000 FT IN THE ALT ALERTER. WE WERE GOING THROUGH THE LNDG CHKLIST, INTERCEPTING THE ILS AND DSNDING THROUGH 4500 FT WHEN ATC SAID THAT WE WERE TO MAINTAIN 5000 FT. THE CAPT TOLD ATC HE READ BACK 4000 FT, WHILE I CLBED BACK TO 5000 FT AND INTERCEPTED THE GS AND FLEW IT DOWN TO LNDG. THE THING THAT I COULD OF DONE DIFFERENT IS CHALLENGED THE CAPT SINCE I DID NOT HEAR THE ALT MYSELF OR ASK ATC TO CONFIRM IT OR ASK THE CAPT TO ASK ATC TO CONFIRM THE ALT.
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.