 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier flight crew reported an altitude overshoot which resulted from manually adjusting the pitch during climb.
| Attributes | |
| ACN | 1749848 |
| Time | |
| Date | 202006 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Medium Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Elevator Trim System |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
We were assigned to level off at 14;000 feet. When the 1;000 foot chime sounded; my first officer stated 'one thousand to go; altitude select.' I verified that altitude sel was displayed on the FMA. At about 13;400 feet; still in pitch hold; I moved the up/dn thumbwheel to shallow the climb rate. My guess is that the aircraft went to altitude* while I was adjusting the pitch; which then deselected altitude sel and reverted to pitch hold; and it went unnoticed. At 14;200 feet we realized that the aircraft had climbed through the selected altitude of 14;000 feet. I quickly pressed altitude; pushed vs with a 700 FPM descent and re selected altitude sel. The aircraft successfully leveled off at 14;000 feet. In total we deviated from our assigned altitude by 300-400 feet for no more than about 10 seconds. ATC was busy talking to other aircraft and did not mention anything to us; nor did we have a chance to tell them that we had deviated. Adjusting pitch hold within 1;000 feet of level off could result in what happened to us. The lesson I learned is to not do this as it could go unnoticed; resulting in an altitude deviation.
Original NASA ASRS Text
Title: Air carrier flight crew reported an altitude overshoot which resulted from manually adjusting the pitch during climb.
Narrative: We were assigned to level off at 14;000 feet. When the 1;000 foot chime sounded; my First Officer stated 'one thousand to go; altitude select.' I verified that ALT SEL was displayed on the FMA. At about 13;400 feet; still in PITCH HOLD; I moved the UP/DN thumbwheel to shallow the climb rate. My guess is that the aircraft went to ALT* while I was adjusting the pitch; which then deselected ALT SEL and reverted to PITCH HOLD; and it went unnoticed. At 14;200 feet we realized that the aircraft had climbed through the selected altitude of 14;000 feet. I quickly pressed ALT; pushed VS with a 700 FPM descent and re selected ALT SEL. The aircraft successfully leveled off at 14;000 feet. In total we deviated from our assigned altitude by 300-400 feet for no more than about 10 seconds. ATC was busy talking to other aircraft and did not mention anything to us; nor did we have a chance to tell them that we had deviated. Adjusting PITCH HOLD within 1;000 feet of level off could result in what happened to us. The lesson I learned is to not do this as it could go unnoticed; resulting in an altitude deviation.
Data retrieved from NASA's ASRS site 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.