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A B737 flight crew for an air carrier reports that they climbed above their assigned altitude because they forgot that the model they were flying did not have automatic leveloff.
| Attributes | |
| ACN | 386630 |
| Time | |
| Date | 199711 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : fwa |
| State Reference | IN |
| Altitude | msl bound lower : 31000 msl bound upper : 31400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| 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 : 160 flight time total : 6500 flight time type : 2000 |
| ASRS Report | 386630 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
For the 2 previous days I had been flying the B737-300 which has automatic leveloff with autoplt engaged. The B737- 200 does not and requires a change in switch position to level off. Also, altitude is transmitted via the captain side altimeter which requires the first officer to look across cockpit. About 200 ft prior to leveloff at FL310 we were given a vector to fwa which required a turn change of NAVAID. I looked at my altimeter and it showed FL308. I started the turn, reduced the vvi to 500 FPM. There was a 100 ft difference between the first officer and captain altimeter which is within limits but the first officer altimeter showed the lower altitude. I overshot the altitude in the turn by 200 ft, but on the captain altimeter it was 300 ft and that's what ATC sees via transponder. We were asked by ATC to confirm altitude. They showed a 400 ft deviation. There were no conflicts and the crew already had taken corrective action.
Original NASA ASRS Text
Title: A B737 FLC FOR AN ACR RPTS THAT THEY CLBED ABOVE THEIR ASSIGNED ALT BECAUSE THEY FORGOT THAT THE MODEL THEY WERE FLYING DID NOT HAVE AUTO LEVELOFF.
Narrative: FOR THE 2 PREVIOUS DAYS I HAD BEEN FLYING THE B737-300 WHICH HAS AUTO LEVELOFF WITH AUTOPLT ENGAGED. THE B737- 200 DOES NOT AND REQUIRES A CHANGE IN SWITCH POS TO LEVEL OFF. ALSO, ALT IS XMITTED VIA THE CAPT SIDE ALTIMETER WHICH REQUIRES THE FO TO LOOK ACROSS COCKPIT. ABOUT 200 FT PRIOR TO LEVELOFF AT FL310 WE WERE GIVEN A VECTOR TO FWA WHICH REQUIRED A TURN CHANGE OF NAVAID. I LOOKED AT MY ALTIMETER AND IT SHOWED FL308. I STARTED THE TURN, REDUCED THE VVI TO 500 FPM. THERE WAS A 100 FT DIFFERENCE BTWN THE FO AND CAPT ALTIMETER WHICH IS WITHIN LIMITS BUT THE FO ALTIMETER SHOWED THE LOWER ALT. I OVERSHOT THE ALT IN THE TURN BY 200 FT, BUT ON THE CAPT ALTIMETER IT WAS 300 FT AND THAT'S WHAT ATC SEES VIA XPONDER. WE WERE ASKED BY ATC TO CONFIRM ALT. THEY SHOWED A 400 FT DEV. THERE WERE NO CONFLICTS AND THE CREW ALREADY HAD TAKEN CORRECTIVE ACTION.
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.