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A B737-700 center tank was being defueled for a pump change and FAA safety inspector noted technician not in the cockpit monitoring fuel quantity or pressure indications.
| Attributes | |
| ACN | 587985 |
| Time | |
| Date | 200307 |
| Day | Mon |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | tower : pit.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 587985 |
| Person 2 | |
| Affiliation | government : faa |
| Function | observation : air carrier inspector |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : company policies non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : pressure & quantity indications other other : person 2 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
During defuel of aircraft's center tank, from full 23000 pounds to approximately 18000 pounds, FAA inspector observed that a mechanic was not in the cockpit. Stated that this was a requirement. Problem was corrected. The mechanic working the job was going between the right wing fueling panel and the cockpit. Per maintenance manual 28-26-00-2, mechanic is to monitor fuel quantity and low pressure indication. Mechanic made one decision to monitor the defuel by going between the wing fueling station and the cockpit, due to aircraft not be completely defueled and pump low pressure would not be a problem.
Original NASA ASRS Text
Title: A B737-700 CTR TANK WAS BEING DEFUELED FOR A PUMP CHANGE AND FAA SAFETY INSPECTOR NOTED TECHNICIAN NOT IN THE COCKPIT MONITORING FUEL QUANTITY OR PRESSURE INDICATIONS.
Narrative: DURING DEFUEL OF ACFT'S CTR TANK, FROM FULL 23000 LBS TO APPROX 18000 LBS, FAA INSPECTOR OBSERVED THAT A MECH WAS NOT IN THE COCKPIT. STATED THAT THIS WAS A REQUIREMENT. PROB WAS CORRECTED. THE MECH WORKING THE JOB WAS GOING BTWN THE R WING FUELING PANEL AND THE COCKPIT. PER MAINT MANUAL 28-26-00-2, MECH IS TO MONITOR FUEL QUANTITY AND LOW PRESSURE INDICATION. MECH MADE ONE DECISION TO MONITOR THE DEFUEL BY GOING BTWN THE WING FUELING STATION AND THE COCKPIT, DUE TO ACFT NOT BE COMPLETELY DEFUELED AND PUMP LOW PRESSURE WOULD NOT BE A PROB.
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.