What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) On June 26, 2009, at approximately 0823 eastern time, a Boeing, 757-222, conducted under 14 CFR part 121, flying from the chicago o’hare international airport (kord) to the baltimore/washington international thurgood marshall airport (kbwi), while at cruise at flight level 370, the crew observed a rsvr light on the left hydraulic system. The flight crew pulled up the eicas status page and observed a hydraulic quantity of 0.48 and decreasing. The captain continued to fly the aircraft as the first officer ran the hydraulic quantity and hydraulic system pressure irregular checklists to determine what systems were affected. Subsequently, the left hydraulic pumps were turned off. After the checklists were accomplished, the captain noticed the yoke was deflected approximately 2 units to the left. The flight crew was concerned about the deflection of the ailerons and elected to declare an emergency and land at Pittsburgh International Airport (kpit). The aircraft landed on runway 28L without further incident. The aircraft rescue fire fighting (ARFF) units had responded, yet were not utilized. The crew reported the hydraulic fluid quantity dropped to .31 in flight and once at the gate the quantity was .21. The crew stated the hydraulic fluid quantity never went to zero. The flight crew’s actions or lack of actions did not contribute to this incident. There were no injuries to the cew or passengers. Jettpro maintenance initially assessed the problem and found hydraulic leak on the number one engine. The leak was isolated to the hydraulic bleeder plug on the engine driven hydraulic pump output line. Jettpro notified united airlines, who dispatched mechanics with the replacement parts. United airlines maintenance replaced the o-ring for the hydraulic bleeder plug, serviced the hydraulic system, and returned the aircraft to service.
As the FAA filed it
(-23) ON JUNE 26, 2009, AT APPROXIMATELY 0823 EASTERN TIME, A BOEING, 757-222, CONDUCTED UNDER 14 CFR PART 121, FLYING FROM THE CHICAGO O’HARE INTERNATIONAL AIRPORT (KORD) TO THE BALTIMORE/WASHINGTON INTERNATIONAL THURGOOD MARSHALL AIRPORT (KBWI), WHILE AT CRUISE AT FLIGHT LEVEL 370, THE CREW OBSERVED A RSVR LIGHT ON THE LEFT HYDRAULIC SYSTEM. THE FLIGHT CREW PULLED UP THE EICAS STATUS PAGE AND OBSERVED A HYDRAULIC QUANTITY OF 0.48 AND DECREASING. THE CAPTAIN CONTINUED TO FLY THE AIRCRAFT AS THE FIRST OFFICER RAN THE HYDRAULIC QUANTITY AND HYDRAULIC SYSTEM PRESSURE IRREGULAR CHECKLISTS TO DETERMINE WHAT SYSTEMS WERE AFFECTED. SUBSEQUENTLY, THE LEFT HYDRAULIC PUMPS WERE TURNED OFF. AFTER THE CHECKLISTS WERE ACCOMPLISHED, THE CAPTAIN NOTICED THE YOKE WAS DEFLECTED APPROXIMATELY 2 UNITS TO THE LEFT. THE FLIGHT CREW WAS CONCERNED ABOUT THE DEFLECTION OF THE AILERONS AND ELECTED TO DECLARE AN EMERGENCY AND LAND AT PITTSBURGH INTERNATIONAL AIRPORT (KPIT). THE AIRCRAFT LANDED ON RUNWAY 28L WITHOUT FURTHER INCIDENT. THE AIRCRAFT RESCUE FIRE FIGHTING (ARFF) UNITS HAD RESPONDED, YET WERE NOT UTILIZED. THE CREW REPORTED THE HYDRAULIC FLUID QUANTITY DROPPED TO .31 IN FLIGHT AND ONCE AT THE GATE THE QUANTITY WAS .21. THE CREW STATED THE HYDRAULIC FLUID QUANTITY NEVER WENT TO ZERO. THE FLIGHT CREW’S ACTIONS OR LACK OF ACTIONS DID NOT CONTRIBUTE TO THIS INCIDENT. THERE WERE NO INJURIES TO THE CEW OR PASSENGERS. JETTPRO MAINTENANCE INITIALLY ASSESSED THE PROBLEM AND FOUND HYDRAULIC LEAK ON THE NUMBER ONE ENGINE. THE LEAK WAS ISOLATED TO THE HYDRAULIC BLEEDER PLUG ON THE ENGINE DRIVEN HYDRAULIC PUMP OUTPUT LINE. JETTPRO NOTIFIED UNITED AIRLINES, WHO DISPATCHED MECHANICS WITH THE REPLACEMENT PARTS. UNITED AIRLINES MAINTENANCE REPLACED THE O-RING FOR THE HYDRAULIC BLEEDER PLUG, SERVICED THE HYDRAULIC SYSTEM, AND RETURNED THE AIRCRAFT TO SERVICE.
Other reports on N529UA · 1
Matched to the same aircraft by N-number and date.