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An MD88 returned to the field due to unable to pressurize cabin caused by loose screw jammed in pressurization control wheel.
| Attributes | |
| ACN | 554239 |
| Time | |
| Date | 200207 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance lead technician : 12 maintenance technician : 14 |
| ASRS Report | 554139 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 26 |
| ASRS Report | 554748 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport other |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : inspection performance deficiency : repair |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Working aircraft X, X airlines jul/sat/02, flight abcd. Logbook write-up on dust cover for speed brake handle needed securing. Went to tool bag and obtained plastic jar with assorted hardware. While in cockpit, looked through jar for a number and screw. Emptied jar on floor aft of pedestal to find needed hardware. Secured spoiler handle dust cover. Aircraft had an air turn-back due to sheet metal screw (pk screw) jammed in slot of pressurization control wheel system. Oxygen masks were deployed automatically. A pk type screw was not used in securing spoiler handle dust cover.
Original NASA ASRS Text
Title: AN MD88 RETURNED TO THE FIELD DUE TO UNABLE TO PRESSURIZE CABIN CAUSED BY LOOSE SCREW JAMMED IN PRESSURIZATION CTL WHEEL.
Narrative: WORKING ACFT X, X AIRLINES JUL/SAT/02, FLT ABCD. LOGBOOK WRITE-UP ON DUST COVER FOR SPD BRAKE HANDLE NEEDED SECURING. WENT TO TOOL BAG AND OBTAINED PLASTIC JAR WITH ASSORTED HARDWARE. WHILE IN COCKPIT, LOOKED THROUGH JAR FOR A NUMBER AND SCREW. EMPTIED JAR ON FLOOR AFT OF PEDESTAL TO FIND NEEDED HARDWARE. SECURED SPOILER HANDLE DUST COVER. ACFT HAD AN AIR TURN-BACK DUE TO SHEET METAL SCREW (PK SCREW) JAMMED IN SLOT OF PRESSURIZATION CTL WHEEL SYS. OXYGEN MASKS WERE DEPLOYED AUTOMATICALLY. A PK TYPE SCREW WAS NOT USED IN SECURING SPOILER HANDLE DUST COVER.
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.