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A B737 PNF copied a clearance for a vector for 230 degrees and set the heading bug accordingly. The PF did not hear the clearance correctly, assumed that a clearance for FL230 had been received, and began a climb to FL230. The PNF intervened and queried the controller.
| Attributes | |
| ACN | 332740 |
| Time | |
| Date | 199604 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dca |
| State Reference | DC |
| Altitude | msl bound lower : 21000 msl bound upper : 21500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 332740 |
| 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 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:
Center gave us a heading change to 230 degrees and another radio frequency. I set 230 in the heading bug and looked down to change the radio frequency. When I looked back up the captain had set FL230 in the altitude alerter and was climbing out of FL213. I told him we were not cleared to FL230 and at approximately FL215 he descended back to FL210. I checked with center and they said we were to maintain FL210. The captain was flying off autoplt and it was my duty by procedure to change the altitude alerter. He changed the alerter because he thought we were supposed to climb to FL230. That is not the procedure.
Original NASA ASRS Text
Title: A B737 PNF COPIED A CLRNC FOR A VECTOR FOR 230 DEGS AND SET THE HDG BUG ACCORDINGLY. THE PF DID NOT HEAR THE CLRNC CORRECTLY, ASSUMED THAT A CLRNC FOR FL230 HAD BEEN RECEIVED, AND BEGAN A CLB TO FL230. THE PNF INTERVENED AND QUERIED THE CTLR.
Narrative: CTR GAVE US A HDG CHANGE TO 230 DEGS AND ANOTHER RADIO FREQ. I SET 230 IN THE HDG BUG AND LOOKED DOWN TO CHANGE THE RADIO FREQ. WHEN I LOOKED BACK UP THE CAPT HAD SET FL230 IN THE ALT ALERTER AND WAS CLBING OUT OF FL213. I TOLD HIM WE WERE NOT CLRED TO FL230 AND AT APPROX FL215 HE DSNDED BACK TO FL210. I CHKED WITH CTR AND THEY SAID WE WERE TO MAINTAIN FL210. THE CAPT WAS FLYING OFF AUTOPLT AND IT WAS MY DUTY BY PROC TO CHANGE THE ALT ALERTER. HE CHANGED THE ALERTER BECAUSE HE THOUGHT WE WERE SUPPOSED TO CLB TO FL230. THAT IS NOT THE PROC.
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.