Air carrier widebody transport had problem extending the left main gear on approach to ppg. Flight was able to maneuver the aircraft and get the gear to lock down.

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Attributes
ACN	125947
Time
Date	198910
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ppg
State Reference	FO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	tower : ppg
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 1000
ASRS Report	125947
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : declared emergency flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Upon calling for gear extension, first officer placed gear level in down position. A loud noise with heavy shaking of aircraft followed. System C hydraulic pressure low light came on. Gauges confirmed loss of system C hydraulic pressure and quantity. Conducted emergency gear extension and all appropriate checklists. Unsafe left main gear indication. Made a fly-by at dead heading so tower could advise his observation. Gear was not fully extended on left main side. Went to gropy intersection and prepared cabin and cockpits for emergency landing. Made flight maneuvers to shake gear loose. Upon completion of maneuvers, heard sound believe to be extension of left main gear. Visual inspection reported same. Another tower fly-by confirmed down position of gear. Subsequent landing was normal. Aircraft was left on runway and 191 passenger and crew deplaned safely. No injuries.

Original NASA ASRS Text

Title: ACR WDB HAD PROBLEM EXTENDING THE LEFT MAIN GEAR ON APCH TO PPG. FLT WAS ABLE TO MANEUVER THE ACFT AND GET THE GEAR TO LOCK DOWN.

Narrative: UPON CALLING FOR GEAR EXTENSION, FO PLACED GEAR LEVEL IN DOWN POS. A LOUD NOISE WITH HEAVY SHAKING OF ACFT FOLLOWED. SYS C HYD PRESSURE LOW LIGHT CAME ON. GAUGES CONFIRMED LOSS OF SYS C HYD PRESSURE AND QUANTITY. CONDUCTED EMER GEAR EXTENSION AND ALL APPROPRIATE CHKLISTS. UNSAFE L MAIN GEAR INDICATION. MADE A FLY-BY AT DEAD HDG SO TWR COULD ADVISE HIS OBSERVATION. GEAR WAS NOT FULLY EXTENDED ON L MAIN SIDE. WENT TO GROPY INTXN AND PREPARED CABIN AND COCKPITS FOR EMER LNDG. MADE FLT MANEUVERS TO SHAKE GEAR LOOSE. UPON COMPLETION OF MANEUVERS, HEARD SOUND BELIEVE TO BE EXTENSION OF L MAIN GEAR. VISUAL INSPECTION RPTED SAME. ANOTHER TWR FLY-BY CONFIRMED DOWN POS OF GEAR. SUBSEQUENT LNDG WAS NORMAL. ACFT WAS LEFT ON RWY AND 191 PAX AND CREW DEPLANED SAFELY. NO INJURIES.

Data retrieved from NASA's ASRS site as of August 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.