An air carrier medium large transport had a utility hydraulic failure.

Attributes
ACN	267410
Time
Date	199404
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pit
State Reference	PA
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 7500 flight time type : 1500
ASRS Report	267410
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

I do not know what caused our #1 hydraulic system failure. We just simply followed the pilot's handbook emergency procedure for a utility hydraulic system failure, notified cleveland center, and diverted to pittsburgh international (no nosewheel steering recommended maximum crosswind 10 KTS. The event was without any other problems. We did declare an emergency prior to landing in pittsburgh. We were towed to the gate after landing. No further problems.

Original NASA ASRS Text

Title: AN ACR MLG HAD A UTILITY HYD FAILURE.

Narrative: I DO NOT KNOW WHAT CAUSED OUR #1 HYD SYS FAILURE. WE JUST SIMPLY FOLLOWED THE PLT'S HANDBOOK EMER PROC FOR A UTILITY HYD SYS FAILURE, NOTIFIED CLEVELAND CENTER, AND DIVERTED TO PITTSBURGH INTL (NO NOSEWHEEL STEERING RECOMMENDED MAX XWIND 10 KTS. THE EVENT WAS WITHOUT ANY OTHER PROBS. WE DID DECLARE AN EMER PRIOR TO LNDG IN PITTSBURGH. WE WERE TOWED TO THE GATE AFTER LNDG. NO FURTHER PROBS.

Data retrieved from NASA's ASRS site as of July 2007 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.