<< >> NASA ASRS Report 451330, October 1999

An air carrier flight crew flying an MD88 from lga experiences a heading mis-compare resulting in a track deviation from the SID and intervention from ATC.

Attributes
ACN	451330
Time
Date	199910
Day	Sat
Local Time Of Day	0601 To 1200
Place
State Reference	NY
Altitude	agl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure sid : lga8
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 225 flight time total : 14000 flight time type : 2000
ASRS Report	451330
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	non adherence : clearance non adherence : published procedure other spatial deviation
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : became reoriented flight crew : overcame equipment problem
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After takeoff at lga runway 22 lga 8 departure, we received a heading error and lost both flight directors. Eventually both flight directors came back. At 2.5 DME the departure is to turn left to 070 degrees. When we selected heading mode, the flight director commanded a right turn, which I followed in the confusion. Departure then told us to turn right to a 360 degree heading and tighten up the turn to avoid jfk. No conflicts arose.

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Original NASA ASRS Text

Title: AN ACR FLC FLYING AN MD88 FROM LGA EXPERIENCES A HEADING MIS-COMPARE RESULTING IN A TRACK DEV FROM THE SID AND INTERVENTION FROM ATC.

Narrative: AFTER TKOF AT LGA RWY 22 LGA 8 DEP, WE RECEIVED A HEADING ERROR AND LOST BOTH FLT DIRECTORS. EVENTUALLY BOTH FLT DIRECTORS CAME BACK. AT 2.5 DME THE DEP IS TO TURN L TO 070 DEGS. WHEN WE SELECTED HEADING MODE, THE FLT DIRECTOR COMMANDED A R TURN, WHICH I FOLLOWED IN THE CONFUSION. DEP THEN TOLD US TO TURN R TO A 360 DEG HDG AND TIGHTEN UP THE TURN TO AVOID JFK. NO CONFLICTS AROSE.

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.