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Light transport with pressurization irregularity has altitude deviation from assigned altitude near cmh.
| Attributes | |
| ACN | 458709 |
| Time | |
| Date | 199910 |
| Day | Fri |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : cmh.airport |
| State Reference | OH |
| Altitude | msl single value : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : cmh.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude descent : vacating altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 270 flight time total : 20000 flight time type : 11000 |
| ASRS Report | 458709 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : clearance non adherence : far |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Environmental Factor Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were returning to the airport because we were unable to pressurize the cabin. Approach cleared us down to 11000 ft. The sic was running the descent and approach checklists. I was flying aircraft, listening to the radios, and listening to the sic. As I was leveling off, the sic asked me a question and at the same time the approach controller said something to us. It diverted my attention enough to where I allowed the aircraft to descend below our assigned altitude. As far as I can remember, we only went down 300-400 ft below altitude. As I was returning to 11000 ft, approach asked what altitude we were descending to. We responded 11000 ft and then never said another word about it. We were not in an emergency situation or under any undue stress. We were in a hurry to get back to the airport and switch aircraft so we could continue with the flight. I should not have tried to do so much myself. I should have let the sic do most of the work so I could mostly fly the aircraft.
Original NASA ASRS Text
Title: LTT WITH PRESSURIZATION IRREGULARITY HAS ALTDEV FROM ASSIGNED ALT NEAR CMH.
Narrative: WE WERE RETURNING TO THE ARPT BECAUSE WE WERE UNABLE TO PRESSURIZE THE CABIN. APCH CLRED US DOWN TO 11000 FT. THE SIC WAS RUNNING THE DSCNT AND APCH CHKLISTS. I WAS FLYING ACFT, LISTENING TO THE RADIOS, AND LISTENING TO THE SIC. AS I WAS LEVELING OFF, THE SIC ASKED ME A QUESTION AND AT THE SAME TIME THE APCH CTLR SAID SOMETHING TO US. IT DIVERTED MY ATTN ENOUGH TO WHERE I ALLOWED THE ACFT TO DSND BELOW OUR ASSIGNED ALT. AS FAR AS I CAN REMEMBER, WE ONLY WENT DOWN 300-400 FT BELOW ALT. AS I WAS RETURNING TO 11000 FT, APCH ASKED WHAT ALT WE WERE DSNDING TO. WE RESPONDED 11000 FT AND THEN NEVER SAID ANOTHER WORD ABOUT IT. WE WERE NOT IN AN EMER SIT OR UNDER ANY UNDUE STRESS. WE WERE IN A HURRY TO GET BACK TO THE ARPT AND SWITCH ACFT SO WE COULD CONTINUE WITH THE FLT. I SHOULD NOT HAVE TRIED TO DO SO MUCH MYSELF. I SHOULD HAVE LET THE SIC DO MOST OF THE WORK SO I COULD MOSTLY FLY THE ACFT.
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.