 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-800 was dispatched in non compliance with autoland CAT IIIA tests not accomplished after #1 and #2 EFIS units removed for cooling screen cleaning. Job card and maintenance manual did not note this requirement.
| Attributes | |
| ACN | 493127 |
| Time | |
| Date | 200011 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : fcc technician : airframe |
| ASRS Report | 493127 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : fcc technician : powerplant |
| ASRS Report | 493132 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : work cards performance deficiency : repair performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | JOB CARD, MAINT. MANUAL |
Narrative:
After working on aircraft xyz 'B' check work card abc, I was informed that the removal of the CDU's (control display unit) affects the status of the aircraft lmp (lower minimum performance). Nowhere on the abc work card or on the aircraft MEL manual does it make reference to the lmp status. The only reference to this matter is found in the procedures manual under the B737 lmp sensors and indications, to where the captain and first officer display units are listed under such list.
Original NASA ASRS Text
Title: A B737-800 WAS DISPATCHED IN NON COMPLIANCE WITH AUTOLAND CAT IIIA TESTS NOT ACCOMPLISHED AFTER #1 AND #2 EFIS UNITS REMOVED FOR COOLING SCREEN CLEANING. JOB CARD AND MAINT MANUAL DID NOT NOTE THIS REQUIREMENT.
Narrative: AFTER WORKING ON ACFT XYZ 'B' CHK WORK CARD ABC, I WAS INFORMED THAT THE REMOVAL OF THE CDU'S (CTL DISPLAY UNIT) AFFECTS THE STATUS OF THE ACFT LMP (LOWER MINIMUM PERFORMANCE). NOWHERE ON THE ABC WORK CARD OR ON THE ACFT MEL MANUAL DOES IT MAKE REF TO THE LMP STATUS. THE ONLY REF TO THIS MATTER IS FOUND IN THE PROCS MANUAL UNDER THE B737 LMP SENSORS AND INDICATIONS, TO WHERE THE CAPT AND FO DISPLAY UNITS ARE LISTED UNDER SUCH LIST.
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.