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Flight crew of cpr LR25 has failure of altitude alerter and climbs above assigned altitude. This results in less than standard separation. Controller vectors both aircraft for separation.
| Attributes | |
| ACN | 382690 |
| Time | |
| Date | 199710 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ave |
| State Reference | CA |
| Altitude | msl bound lower : 28000 msl bound upper : 28500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 78 flight time total : 17000 flight time type : 565 |
| ASRS Report | 382690 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 300 flight time total : 3000 flight time type : 1000 |
| ASRS Report | 382279 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 27000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The PF, filed as PIC, called ZLA as requested. Better CRM on our part would have prevented the deviation. I took control of aircraft, clicked off autoplt after warning him of his altitude. I should have taken control at FL283 instead of FL285. We did see abc air carrier at first ATC report. As capts, we sometimes try not to hurt a copilot's feelings. A lesson learned. Good/better CRM could have prevented the deviation. I certainly owe an apology to ZLA and abc air carrier and thank them for their professionalism. Note: the copilot also took yoke and initiated corrective action about same time I did. We talked later and discussed how we could have done better. Supplemental information from acn 382279: the altitude alerter was never heard or seen throughout this deviation. After rotating both the altimeter and alerter knobs, both altimeter and the altitude alerter began to function again normally. We were asked to call ZLA upon our arrival at sfo to explain the situation and we complied immediately upon landing. The failed equipment was traced to an altimeter, requiring adjustments to allow for correct altitude and altitude warning system functions.
Original NASA ASRS Text
Title: FLC OF CPR LR25 HAS FAILURE OF ALT ALERTER AND CLBS ABOVE ASSIGNED ALT. THIS RESULTS IN LTSS. CTLR VECTORS BOTH ACFT FOR SEPARATION.
Narrative: THE PF, FILED AS PIC, CALLED ZLA AS REQUESTED. BETTER CRM ON OUR PART WOULD HAVE PREVENTED THE DEV. I TOOK CTL OF ACFT, CLICKED OFF AUTOPLT AFTER WARNING HIM OF HIS ALT. I SHOULD HAVE TAKEN CTL AT FL283 INSTEAD OF FL285. WE DID SEE ABC ACR AT FIRST ATC RPT. AS CAPTS, WE SOMETIMES TRY NOT TO HURT A COPLT'S FEELINGS. A LESSON LEARNED. GOOD/BETTER CRM COULD HAVE PREVENTED THE DEV. I CERTAINLY OWE AN APOLOGY TO ZLA AND ABC ACR AND THANK THEM FOR THEIR PROFESSIONALISM. NOTE: THE COPLT ALSO TOOK YOKE AND INITIATED CORRECTIVE ACTION ABOUT SAME TIME I DID. WE TALKED LATER AND DISCUSSED HOW WE COULD HAVE DONE BETTER. SUPPLEMENTAL INFO FROM ACN 382279: THE ALT ALERTER WAS NEVER HEARD OR SEEN THROUGHOUT THIS DEV. AFTER ROTATING BOTH THE ALTIMETER AND ALERTER KNOBS, BOTH ALTIMETER AND THE ALT ALERTER BEGAN TO FUNCTION AGAIN NORMALLY. WE WERE ASKED TO CALL ZLA UPON OUR ARR AT SFO TO EXPLAIN THE SIT AND WE COMPLIED IMMEDIATELY UPON LNDG. THE FAILED EQUIP WAS TRACED TO AN ALTIMETER, REQUIRING ADJUSTMENTS TO ALLOW FOR CORRECT ALT AND ALT WARNING SYS FUNCTIONS.
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.