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After informing dispatch and maintenance control of a large duct pressure split between the left and right air conditioning distribution system; a B737-700 captain receives an ACARS message directing them to divert. Prior to departure; a lead ramp agent had informed flight crew the forward cargo compartment floor was excessively warm; but maintenance control said everything 'ok'.
| Attributes | |
| ACN | 855151 |
| Time | |
| Date | 200910 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Air Conditioning Distribution System |
| Person 1 | |
| Function | Captain |
| Experience | Flight Crew Last 90 Days 192 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
The lead ramp agent informed us that the floor of the forward cargo bin was hot compared to the cargo bin walls and the forward cargo bin was excessively warm when the cargo bin was opened. I called dispatch and got a patch to maintenance control. I notified them of the information from the ramp personnel. I also put the lead ramp agent on the phone to speak directly to maintenance control. After their conversation ended; maintenance control told me everything was normal. During climbout; we observed a large pack duct pressure split (left 43/right 15); sent this information to dispatch via ACARS and asked them to share this with maintenance control. A similar large pressure split was also noted at cruise altitude fl 400 (left 31/right 14). Shortly after reaching cruise altitude; dispatch sent us an ACARS message directing us to divert. We informed ATC and diverted uneventfully. The duct pressure split was written up and the aircraft taken out of service. We were given another aircraft and continued three more legs.
Original NASA ASRS Text
Title: After informing Dispatch and Maintenance Control of a large duct pressure split between the left and right air conditioning distribution system; A B737-700 Captain receives an ACARS message directing them to divert. Prior to departure; a Lead Ramp Agent had informed Flight Crew the Forward cargo compartment floor was excessively warm; but Maintenance Control said everything 'OK'.
Narrative: The Lead Ramp Agent informed us that the floor of the Forward cargo bin was hot compared to the cargo bin walls and the Forward cargo bin was excessively warm when the cargo bin was opened. I called Dispatch and got a patch to Maintenance Control. I notified them of the information from the Ramp personnel. I also put the Lead Ramp Agent on the phone to speak directly to Maintenance Control. After their conversation ended; Maintenance Control told me everything was normal. During climbout; we observed a large pack duct pressure split (L 43/R 15); sent this information to Dispatch via ACARS and asked them to share this with Maintenance Control. A similar large pressure split was also noted at cruise altitude FL 400 (L 31/R 14). Shortly after reaching cruise altitude; Dispatch sent us an ACARS message directing us to divert. We informed ATC and diverted uneventfully. The duct pressure split was written up and the aircraft taken out of service. We were given another aircraft and continued three more legs.
Data retrieved from NASA's ASRS site as of April 2012 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.