<< >> NASA ASRS Report 443697, July 1999

A beech 1900D immediately after takeoff at 1500 ft returned to the field due to the right engine bleed air system failure caused by right pressure regulator valve failed closed. Left bleed system was previously deferred as inoperative.

Attributes
ACN	443697
Time
Date	199907
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	msl single value : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a90.tracon
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Navigation In Use	other vortac
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 3400 flight time type : 3000
ASRS Report	443697
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : right bleed fail
Resolutory Action	flight crew : diverted to another airport flight crew : landed as precaution
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After departure, my first officer called 'positive rate' at which time the gear comes up and the environmental system is turned on. At this point we received a right environmental fail warning. The left environmental system was already MEL'ed inoperative. Followed the checklist but the right environmental fail annunciator stayed illuminated. We were without heat for the cabin or pressurization. My director was to return to the field to have it repaired before we continued on for over 2 1/2 hours of flight. The system was repaired and we continued on to leb and then on to bos. Turned out there was a faulty prsov valve.

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Original NASA ASRS Text

Title: A BEECH 1900D IMMEDIATELY AFTER TKOF AT 1500 FT RETURNED TO THE FIELD DUE TO THE R ENG BLEED AIR SYS FAILURE CAUSED BY R PRESSURE REGULATOR VALVE FAILED CLOSED. L BLEED SYS WAS PREVIOUSLY DEFERRED AS INOP.

Narrative: AFTER DEP, MY FO CALLED 'POSITIVE RATE' AT WHICH TIME THE GEAR COMES UP AND THE ENVIRONMENTAL SYS IS TURNED ON. AT THIS POINT WE RECEIVED A R ENVIRONMENTAL FAIL WARNING. THE L ENVIRONMENTAL SYS WAS ALREADY MEL'ED INOP. FOLLOWED THE CHKLIST BUT THE R ENVIRONMENTAL FAIL ANNUNCIATOR STAYED ILLUMINATED. WE WERE WITHOUT HEAT FOR THE CABIN OR PRESSURIZATION. MY DIRECTOR WAS TO RETURN TO THE FIELD TO HAVE IT REPAIRED BEFORE WE CONTINUED ON FOR OVER 2 1/2 HRS OF FLT. THE SYS WAS REPAIRED AND WE CONTINUED ON TO LEB AND THEN ON TO BOS. TURNED OUT THERE WAS A FAULTY PRSOV VALVE.

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.