Flight crew of B757 on approach encounters thunderstorms over runway and makes missed approach. They have flight control hydraulic light illuminate and have low fuel condition. When placed in hold they divert to alternate. At alternate they also encounter thunderstorms and divert to off line airport.

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Attributes
ACN	377222
Time
Date	199708
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : boi airport : slc
State Reference	UT
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	tracon : slc tracon : bad
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing : missed approach other
Route In Use	enroute : on vectors
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 : 6000 flight time type : 200
ASRS Report	377222
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical inflight encounter : weather other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Air carrier flight bos-slc. Multiple approach vectors to avoid several rapidly developing thunderstorms, runway change from runway 16L to runway 34L. Cleared for a visual approach runway 34L. Requested ILS when cloud obscured runway. Go around initiated near OM when severe turbulence encountered. Aircraft ahead reported same upon landing. EICAS message 'C flight control hydraulic' illuminated during go around. Cleared to hold at ffu. Maintenance and dispatcher contacted and advised that we planned to divert to our altitude (boi) because of fuel state. During descent to boi, thunderstorms drifted over runway causing an air carrier ahead to go around. We declared minimum fuel (6500 pounds) and requested clearance to twf (twin falls, off line airport). Cleared direct and landed with 4200 pounds.

Original NASA ASRS Text

Title: FLC OF B757 ON APCH ENCOUNTERS TSTMS OVER RWY AND MAKES MISSED APCH. THEY HAVE FLT CTL HYD LIGHT ILLUMINATE AND HAVE LOW FUEL CONDITION. WHEN PLACED IN HOLD THEY DIVERT TO ALTERNATE. AT ALTERNATE THEY ALSO ENCOUNTER TSTMS AND DIVERT TO OFF LINE ARPT.

Narrative: ACR FLT BOS-SLC. MULTIPLE APCH VECTORS TO AVOID SEVERAL RAPIDLY DEVELOPING TSTMS, RWY CHANGE FROM RWY 16L TO RWY 34L. CLRED FOR A VISUAL APCH RWY 34L. REQUESTED ILS WHEN CLOUD OBSCURED RWY. GAR INITIATED NEAR OM WHEN SEVERE TURB ENCOUNTERED. ACFT AHEAD RPTED SAME UPON LNDG. EICAS MESSAGE 'C FLT CTL HYD' ILLUMINATED DURING GAR. CLRED TO HOLD AT FFU. MAINT AND DISPATCHER CONTACTED AND ADVISED THAT WE PLANNED TO DIVERT TO OUR ALT (BOI) BECAUSE OF FUEL STATE. DURING DSCNT TO BOI, TSTMS DRIFTED OVER RWY CAUSING AN ACR AHEAD TO GAR. WE DECLARED MINIMUM FUEL (6500 LBS) AND REQUESTED CLRNC TO TWF (TWIN FALLS, OFF LINE ARPT). CLRED DIRECT AND LANDED WITH 4200 LBS.

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.