 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B727 overshot assigned altitude FL270. PNF distraction and his altimeter lagged the captain's but not significantly.
| Attributes | |
| ACN | 356490 |
| Time | |
| Date | 199612 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : eed |
| State Reference | CA |
| Altitude | msl bound lower : 27000 msl bound upper : 27280 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 4000 flight time type : 300 |
| ASRS Report | 356490 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 60 flight time total : 3000 flight time type : 750 |
| ASRS Report | 356899 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Climbing to FL270, at 1000 ft below, captain and first officer called out, '1000 ft to go' as alerter 'sounded' 1000 ft to go. First officer went back to looking at flight plan and glanced up at his altimeter when he felt a 'pushing over' to leveloff. Pushover was normal. At what I thought was altitude, the alerter sounded off a deviation and PF (captain) abruptly pushed over to correct to his altimeter. It turns out that my altimeter read lower than his by 60+ ft! Because of that, what I thought was his leveloff, wasn't. Total deviation was 280 ft and correction was instantly applied. My flight plan distraction compounded with the altimeter error and the false assumption we were leveling off, contributed to this deviation.
Original NASA ASRS Text
Title: B727 OVERSHOT ASSIGNED ALT FL270. PNF DISTR AND HIS ALTIMETER LAGGED THE CAPT'S BUT NOT SIGNIFICANTLY.
Narrative: CLBING TO FL270, AT 1000 FT BELOW, CAPT AND FO CALLED OUT, '1000 FT TO GO' AS ALERTER 'SOUNDED' 1000 FT TO GO. FO WENT BACK TO LOOKING AT FLT PLAN AND GLANCED UP AT HIS ALTIMETER WHEN HE FELT A 'PUSHING OVER' TO LEVELOFF. PUSHOVER WAS NORMAL. AT WHAT I THOUGHT WAS ALT, THE ALERTER SOUNDED OFF A DEV AND PF (CAPT) ABRUPTLY PUSHED OVER TO CORRECT TO HIS ALTIMETER. IT TURNS OUT THAT MY ALTIMETER READ LOWER THAN HIS BY 60+ FT! BECAUSE OF THAT, WHAT I THOUGHT WAS HIS LEVELOFF, WASN'T. TOTAL DEV WAS 280 FT AND CORRECTION WAS INSTANTLY APPLIED. MY FLT PLAN DISTR COMPOUNDED WITH THE ALTIMETER ERROR AND THE FALSE ASSUMPTION WE WERE LEVELING OFF, CONTRIBUTED TO THIS DEV.
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.