<< >> NASA ASRS Report 151018, July 1990

Air carrier medium large transport diverts to a VMC alternate airport as WX and mechanical problems create a low fuel state. Not known if dispatcher was in agreement with diversion.

Attributes
ACN	151018
Time
Date	199007
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bed airport : bos
State Reference	MA
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bos
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer observation : observer other personnel other
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 120 flight time total : 3700 flight time type : 375
ASRS Report	151018
Person 2
Affiliation	company : air carrier
Function	flight crew : captain observation : company check pilot oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical inflight encounter : weather other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Loss of hydraulic fluid was indicated on the right hydraulic system on the medium large transport aircraft flight proceeding to bos. Arrival WX was fog, RVR reported as low as 2200' during 2 approachs which resulted in missed approachs. Due to hydraulic loss, landing gear was left down after initial extension. The landing gear down confign resulted in higher fuel flow than normal. Decision was made to divert to bdl. With fuel quantity decreasing and WX (cloud buildups) between bos and bdl, decision was made to land at bed which was VFR and readily available. An uneventful ILS approach and landing was made at bed. An emergency was declared and crash equipment was requested at both bos and bed due to hydraulic problem.

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Original NASA ASRS Text

Title: ACR MLG DIVERTS TO A VMC ALTERNATE ARPT AS WX AND MECHANICAL PROBLEMS CREATE A LOW FUEL STATE. NOT KNOWN IF DISPATCHER WAS IN AGREEMENT WITH DIVERSION.

Narrative: LOSS OF HYD FLUID WAS INDICATED ON THE R HYD SYS ON THE MLG ACFT FLT PROCEEDING TO BOS. ARR WX WAS FOG, RVR RPTED AS LOW AS 2200' DURING 2 APCHS WHICH RESULTED IN MISSED APCHS. DUE TO HYD LOSS, LNDG GEAR WAS LEFT DOWN AFTER INITIAL EXTENSION. THE LNDG GEAR DOWN CONFIGN RESULTED IN HIGHER FUEL FLOW THAN NORMAL. DECISION WAS MADE TO DIVERT TO BDL. WITH FUEL QUANTITY DECREASING AND WX (CLOUD BUILDUPS) BTWN BOS AND BDL, DECISION WAS MADE TO LAND AT BED WHICH WAS VFR AND READILY AVAILABLE. AN UNEVENTFUL ILS APCH AND LNDG WAS MADE AT BED. AN EMER WAS DECLARED AND CRASH EQUIP WAS REQUESTED AT BOTH BOS AND BED DUE TO HYD PROB.

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.