 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
The maintenance release document on a B747 did not reflect which part of the air conditioning system was deferred.
| Attributes | |
| ACN | 1371812 |
| Time | |
| Date | 201607 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Aircraft Auto Temperature System |
| Person 1 | |
| Function | Other / Unknown |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural MEL |
Narrative:
The flight crew called and were concerned that a deferred item on their mrd did not reflect what part of the system was on MEL. Below is the text as it appears:pack EICAS status message displayed. Neither ptc in control of pack 1 or pack component failure or overheat or pack trip due to overheat or out of sequence. Pack 1 status message reset 3 times by mechanics keeps coming back.this is the text as it appears on the mrd. It does not show what system is actually on MEL. It shows at the bottom of the write up that pack 1 channel a is inop. This should show up on the mrd. On the mrd it shows the placard 2126s but it gives no description of what this particular placard is; ie pack 1 channel a. See MEL below.pack temperature control systems.spec notes: one pack temperature controller (a or B) may be inoperative for each operating pack. Maintenance: install deferred no. Decal adjacent to associated pack control selector on the P5 overhead panel. This lack of information on the mrd for our flight crew is going to and has already caused confusion. This could also lead to a flight crew possibly configuring the flight deck incorrectly since the inop system is not being identified correctly.
Original NASA ASRS Text
Title: The Maintenance Release Document on a B747 did not reflect which part of the Air Conditioning system was deferred.
Narrative: The flight crew called and were concerned that a deferred item on their MRD did not reflect what part of the system was on MEL. Below is the text as it appears:Pack EICAS status message displayed. Neither PTC in control of pack 1 or pack component failure or overheat or pack trip due to overheat or out of sequence. Pack 1 status message reset 3 times by mechanics keeps coming back.This is the text as it appears on the MRD. It does not show what system is actually on MEL. It shows at the bottom of the write up that Pack 1 Channel A is inop. This should show up on the MRD. On the MRD it shows the Placard 2126s but it gives no description of what this particular placard is; IE Pack 1 Channel A. See MEL below.Pack temperature control systems.Spec notes: one pack temperature controller (A or B) may be inoperative for each operating pack. Maintenance: Install deferred no. Decal adjacent to associated pack control selector on the P5 overhead panel. This lack of information on the MRD for our flight crew is going to and has already caused confusion. This could also lead to a flight crew possibly configuring the flight deck incorrectly since the inop system is not being identified correctly.
Data retrieved from NASA's ASRS site 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.