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A B727 flight leaves its assigned altitude when in a turn with the altitude hold not functioning near wever intersection, mia, fl.
| Attributes | |
| ACN | 476410 |
| Time | |
| Date | 200006 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : wever |
| State Reference | FL |
| Altitude | msl bound lower : 9650 msl bound upper : 10000 |
| Environment | |
| Weather Elements | Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : duval |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : multi engine |
| ASRS Report | 476410 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 476411 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to assigned altitude |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance Weather |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Duval one arrival approaching wever intersection. Rapid left deviation around cell required. Captain flying, first officer requesting deviation, flight engineer engaged in arrival preparation duties. Captain disengaged auxiliary navigation to turn and altitude hold disengaged without crew notice. First officer remarked on altitude was not as assigned. I looked at captain altitude and saw 9650 ft. Captain immediately corrected. No comment made from controller, no aircraft noticed in area. Total deviation from assigned altitude was less than 30 seconds.
Original NASA ASRS Text
Title: A B727 FLT LEAVES ITS ASSIGNED ALT WHEN IN A TURN WITH THE ALT HOLD NOT FUNCTIONING NEAR WEVER INTXN, MIA, FL.
Narrative: DUVAL ONE ARR APCHING WEVER INTXN. RAPID L DEV AROUND CELL REQUIRED. CAPT FLYING, FO REQUESTING DEV, FE ENGAGED IN ARR PREPARATION DUTIES. CAPT DISENGAGED AUX NAV TO TURN AND ALT HOLD DISENGAGED WITHOUT CREW NOTICE. FO REMARKED ON ALT WAS NOT AS ASSIGNED. I LOOKED AT CAPT ALT AND SAW 9650 FT. CAPT IMMEDIATELY CORRECTED. NO COMMENT MADE FROM CTLR, NO ACFT NOTICED IN AREA. TOTAL DEV FROM ASSIGNED ALT WAS LESS THAN 30 SECONDS.
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.