Filter Cases
Technical Case Study: In-Flight Reduction Gear Box (RGB) Failure and Metal Contamination
During a routine flight, the crew observed a sudden drop in the Reduction Gear Assembly (RGB) oil pressure, indicated by the "G" needle on the cockpit...
T56 Engine Power Section Oil Pressure High Indication Corrected by Main Oil Pump Regulator Adjustment
After engine start, the T56 engine power section oil pressure indication was reading 62 PSI, which exceeded the normal operating limit of 50–60 PSI....
Technical Case Study: Troubleshooting No Ignition During Start (16%-20% RPM)
1. Problem Description During a standard ground start attempt, the engine reached the 16% RPM threshold where ignition and fuel flow are scheduled to...
Technical Case Study: RPM Hang and Tailpipe Torching (T56 Engine)
Technical Case Study: RPM Hang and Tailpipe Torching (T56 Engine) 1. Problem Description During standard ground start attempts, the engine consist...
Power Fluctuation Due to Temperature Datum System Malfunction
During climb at approximately 20,000 feet, the flight crew reported power fluctuations on engine No.4. The following parameters were observed: R...
No. 3 Generator Failure to Parallel
Issue: After engine start, the No. 3 Generator comes online but fails to parallel with the other generators. The "Gen Out" light extinguishes, but th...
Utility Hydraulic System Pressure Fluctuation
Issue: The Utility Hydraulic System pressure fluctuates between 2800 and 3200 PSI during flight control inputs. The low-pressure warning light flicke...
Technical Case Study: T56 Reduction Gear Assembly Hydraulic Pump
Technical Case Study: T56 Reduction Gear Assembly Hydraulic Pump 1. Component Location Each T56 engine is equipped with one hydraulic pump mounted o...
Technical Case Study: Troubleshooting Aileron Control Binding (Jerk at End-of-Travel)
1. Problem Statement During a routine operational check of the flight controls, a pilot reported a "jerk" or a momentary "stop-then-continue" sensati...