 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Boeing 737-800 flight crew reported the complete loss of system a hydraulic fluid after a supply line was damaged by a tire failure.
| Attributes | |
| ACN | 1578519 |
| Time | |
| Date | 201809 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Main Gear Tire |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Total 20000 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Total 18000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Weight And Balance Deviation - Procedural Published Material / Policy |
Narrative:
Enroute [from] ZZZ; [we] received master caution light at 36;000 feet for system a engine driven hydraulic pump. [We] executed QRH procedure then noticed quantity in system a was zero without the expected additional caution lights.executed phone patch to dispatch and maintenance on arinc. Maintenance expressed concern about running electric pump with a zero quantity indication.[we requested priority and] diverted to nearby to ZZZ1. [We] checked overweight landing app and hydraulic loss landing chart. [We] tried lowering landing gear early resulting in total loss of system a including expected low pressure lights. [We] conducted second hydraulic QRH procedure for total loss of system a and integrated 737 qualified jumpseater in manual gear extension procedure. Landed runway xx at ZZZ1. Arff personnel inspected aircraft and revealed tire damage and leaking hydraulic fluid. [We] had gear chocked and pinned. Passengers deplaned by [read] door and escorted by aarf to terminal on foot. [We] turned aircraft over to local maintenance and contacted ZZZ chief pilot.it seems the #3 tire shredded and caused system a hydraulics to leak. Tire shred was unknown until after landing.loss of system a QRH procedure starts with three low pressure annunciator indications; but we only had one of these; initially causing speculation whether this was the correct procedure to apply or not.
Original NASA ASRS Text
Title: Boeing 737-800 flight crew reported the complete loss of System A hydraulic fluid after a supply line was damaged by a tire failure.
Narrative: Enroute [from] ZZZ; [we] received Master Caution light at 36;000 feet for System A Engine Driven Hydraulic Pump. [We] executed QRH procedure then noticed quantity in System A was zero without the expected additional caution lights.Executed phone patch to Dispatch and Maintenance on ARINC. Maintenance expressed concern about running electric pump with a zero quantity indication.[We requested priority and] diverted to nearby to ZZZ1. [We] checked overweight landing app and hydraulic loss landing chart. [We] tried lowering landing gear early resulting in total loss of System A including expected low pressure lights. [We] conducted second Hydraulic QRH procedure for total loss of System A and integrated 737 qualified jumpseater in Manual Gear Extension procedure. Landed Runway XX at ZZZ1. ARFF personnel inspected aircraft and revealed tire damage and leaking hydraulic fluid. [We] had gear chocked and pinned. Passengers deplaned by [read] door and escorted by AARF to terminal on foot. [We] turned aircraft over to local Maintenance and contacted ZZZ Chief Pilot.It seems the #3 tire shredded and caused System A hydraulics to leak. Tire shred was unknown until after landing.Loss of System A QRH procedure starts with three low pressure annunciator indications; but we only had one of these; initially causing speculation whether this was the correct procedure to apply or not.
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.