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MEL manual for B737-800, chapter 36, has high stage bleed valve engine location illustration incorrect.
| Attributes | |
| ACN | 518941 |
| Time | |
| Date | 200107 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| 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 |
| Navigation In Use | other |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant technician : fcc |
| ASRS Report | 518941 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication |
| Primary Problem | Chart Or Publication |
Narrative:
While locking out high stage valve, per MEL 36-00-09, found picture in MEL mislabeled or misleading for maintenance purposes. Attached is a copy of MEL 36-00-09 showing high stage valve, above the centerline of the engine on l-hand side. Actual location, per flight information manual 36-10, shows valve location below centerline. Confusing the high stage valve with the pressure regulator and shutoff valve, a high possibility if only going by the MEL picture.
Original NASA ASRS Text
Title: MEL MANUAL FOR B737-800, CHAPTER 36, HAS HIGH STAGE BLEED VALVE ENG LOCATION ILLUSTRATION INCORRECT.
Narrative: WHILE LOCKING OUT HIGH STAGE VALVE, PER MEL 36-00-09, FOUND PICTURE IN MEL MISLABELED OR MISLEADING FOR MAINT PURPOSES. ATTACHED IS A COPY OF MEL 36-00-09 SHOWING HIGH STAGE VALVE, ABOVE THE CTRLINE OF THE ENG ON L-HAND SIDE. ACTUAL LOCATION, PER FLT INFO MANUAL 36-10, SHOWS VALVE LOCATION BELOW CTRLINE. CONFUSING THE HIGH STAGE VALVE WITH THE PRESSURE REGULATOR AND SHUTOFF VALVE, A HIGH POSSIBILITY IF ONLY GOING BY THE MEL PICTURE.
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.