Air carrier large transport loses compass systems on takeoff after aircraft has had maintenance repairs at FBO facility. Ferry flight gets a no compass approach assist from center controller.

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Attributes
ACN	134994
Time
Date	199001
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : pae
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 2500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff climbout : intermediate altitude climbout : initial
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 10000 flight time type : 2200
ASRS Report	134994
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : provided flight assist flight crew : overcame equipment problem flight crew : declared emergency other other
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

Loss of all heading information compass system #1 and #2 upon takeoff form pae. Moderate turbulence rendered wet compass unreliable to unusable. No compass flags or annunciator lights visible before or during loss of system. Requested steering commands from departure for heading information. Requested a circular holding pattern to sort situation out. After approximately 7 min hold, requested and received vectors to a VFR landing at sea, backed up with a no gyro ILS approach to sea. Approach and landing normal at sea. Aircraft received maintenance at the FBO facility at pae prior to described ferry flight.

Original NASA ASRS Text

Title: ACR LGT LOSES COMPASS SYSTEMS ON TKOF AFTER ACFT HAS HAD MAINTENANCE REPAIRS AT FBO FAC. FERRY FLT GETS A NO COMPASS APCH ASSIST FROM CENTER CTLR.

Narrative: LOSS OF ALL HDG INFO COMPASS SYS #1 AND #2 UPON TKOF FORM PAE. MODERATE TURB RENDERED WET COMPASS UNRELIABLE TO UNUSABLE. NO COMPASS FLAGS OR ANNUNCIATOR LIGHTS VISIBLE BEFORE OR DURING LOSS OF SYS. REQUESTED STEERING COMMANDS FROM DEP FOR HDG INFO. REQUESTED A CIRCULAR HOLDING PATTERN TO SORT SITUATION OUT. AFTER APPROX 7 MIN HOLD, REQUESTED AND RECEIVED VECTORS TO A VFR LNDG AT SEA, BACKED UP WITH A NO GYRO ILS APCH TO SEA. APCH AND LNDG NORMAL AT SEA. ACFT RECEIVED MAINT AT THE FBO FAC AT PAE PRIOR TO DESCRIBED FERRY FLT.

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.