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A citation 650 experienced a battery overtemp resulting in an emergency landing. While aircraft was descending, the flight crew overshot an assigned altitude.
| Attributes | |
| ACN | 592287 |
| Time | |
| Date | 200308 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bna.airport |
| State Reference | TN |
| Altitude | msl single value : 38000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation III, VI, VII |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : vacating altitude climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 68 flight time total : 8000 flight time type : 1000 |
| ASRS Report | 592287 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 8700 flight time type : 50 |
| ASRS Report | 592293 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : overshoot |
| Independent Detector | aircraft equipment other aircraft equipment : batt temp light |
| Resolutory Action | flight crew : landed in emergency condition flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
While climbing out of approximately FL380, our #2 hot battery annunciator light came on. We pulled out the checklist and started to follow it and also told center we needed a descent -- knowing that we would have to make a landing soon, but had not declared an emergency yet. The controller gave us a descent to FL350 and a heading of 30 or 40 degrees to our left. Within a very short period of time, the annunciator went from a steady annunciator light (60 degrees) to a flashing annunciator light (71 degrees). We declared an emergency and informed ATC that we needed to land as soon as practical and asked for all available airports with emergency equipment. Even though we followed the checklist and isolated the battery from the electrical system, the temperature continued to climb and that had our undivided attention. Unfortunately, during this time, I descended below the FL350 assigned altitude. I cannot remember if we had declared an emergency before or after the altitude deviation, but the 2 were almost simultaneous. Fortunately, the battery temperature stabilized at 73 degrees on the descent and we diverted to nashville with an uneventful landing. Supplemental information from acn 592293: upon landing at bna we checked out the battery and taxied to FBO with no further problems.
Original NASA ASRS Text
Title: A CITATION 650 EXPERIENCED A BATTERY OVERTEMP RESULTING IN AN EMER LNDG. WHILE ACFT WAS DSNDING, THE FLT CREW OVERSHOT AN ASSIGNED ALT.
Narrative: WHILE CLBING OUT OF APPROX FL380, OUR #2 HOT BATTERY ANNUNCIATOR LIGHT CAME ON. WE PULLED OUT THE CHKLIST AND STARTED TO FOLLOW IT AND ALSO TOLD CTR WE NEEDED A DSCNT -- KNOWING THAT WE WOULD HAVE TO MAKE A LNDG SOON, BUT HAD NOT DECLARED AN EMER YET. THE CTLR GAVE US A DSCNT TO FL350 AND A HDG OF 30 OR 40 DEGS TO OUR L. WITHIN A VERY SHORT PERIOD OF TIME, THE ANNUNCIATOR WENT FROM A STEADY ANNUNCIATOR LIGHT (60 DEGS) TO A FLASHING ANNUNCIATOR LIGHT (71 DEGS). WE DECLARED AN EMER AND INFORMED ATC THAT WE NEEDED TO LAND AS SOON AS PRACTICAL AND ASKED FOR ALL AVAILABLE ARPTS WITH EMER EQUIP. EVEN THOUGH WE FOLLOWED THE CHKLIST AND ISOLATED THE BATTERY FROM THE ELECTRICAL SYS, THE TEMP CONTINUED TO CLB AND THAT HAD OUR UNDIVIDED ATTN. UNFORTUNATELY, DURING THIS TIME, I DSNDED BELOW THE FL350 ASSIGNED ALT. I CANNOT REMEMBER IF WE HAD DECLARED AN EMER BEFORE OR AFTER THE ALTDEV, BUT THE 2 WERE ALMOST SIMULTANEOUS. FORTUNATELY, THE BATTERY TEMP STABILIZED AT 73 DEGS ON THE DSCNT AND WE DIVERTED TO NASHVILLE WITH AN UNEVENTFUL LNDG. SUPPLEMENTAL INFO FROM ACN 592293: UPON LNDG AT BNA WE CHKED OUT THE BATTERY AND TAXIED TO FBO WITH NO FURTHER PROBS.
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.