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Air carrier medium large transport cabin pressurization warning activated as the aircraft climbed through 10500'.
| Attributes | |
| ACN | 163441 |
| Time | |
| Date | 199011 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : rno |
| State Reference | NV |
| Altitude | msl bound lower : 10000 msl bound upper : 10500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa tower : lnk |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 280 flight time total : 7000 flight time type : 1800 |
| ASRS Report | 163441 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time type : 80 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On a maintenance ferry origination preflight check in reno, copilot failed to select automatic pressurization on system. An unpressurized takeoff is required. Supply switches were turned on after takeoff at approximately 5500' MSL (1000' AGL). Aircraft was cleared to 15000'. After passing 10500' MSL 'cabin altitude alert' sounded and aircraft descended to 10000' MSL, while calling ZOA to request 10000' MSL. Automatic pressurization was selected immediately when alert sounded, but took a few mins to actually pressurize aircraft. Flight resumed west/O incident. Contributing factors were new copilot (80 hours total in aircraft during four month period) and crew concentration on previous mechanical discrepancy on right engine during preflight and takeoff checks.
Original NASA ASRS Text
Title: ACR MLG CABIN PRESSURIZATION WARNING ACTIVATED AS THE ACFT CLIMBED THROUGH 10500'.
Narrative: ON A MAINT FERRY ORIGINATION PREFLT CHK IN RENO, COPLT FAILED TO SELECT AUTO PRESSURIZATION ON SYS. AN UNPRESSURIZED TKOF IS REQUIRED. SUPPLY SWITCHES WERE TURNED ON AFTER TKOF AT APPROX 5500' MSL (1000' AGL). ACFT WAS CLRED TO 15000'. AFTER PASSING 10500' MSL 'CABIN ALT ALERT' SOUNDED AND ACFT DSNDED TO 10000' MSL, WHILE CALLING ZOA TO REQUEST 10000' MSL. AUTO PRESSURIZATION WAS SELECTED IMMEDIATELY WHEN ALERT SOUNDED, BUT TOOK A FEW MINS TO ACTUALLY PRESSURIZE ACFT. FLT RESUMED W/O INCIDENT. CONTRIBUTING FACTORS WERE NEW COPLT (80 HRS TOTAL IN ACFT DURING FOUR MONTH PERIOD) AND CREW CONCENTRATION ON PREVIOUS MECHANICAL DISCREPANCY ON R ENG DURING PREFLT AND TKOF CHKS.
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.