Departure DC9 flight crew fails to make the turn to 040 degrees on the lga departure procedure when they are distraction by some form of a turbulence encounter. Departure controller catches their oversight after 1 min.

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Attributes
ACN	376650
Time
Date	199708
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	msl bound lower : 4000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 11000 flight time type : 8000
ASRS Report	376650
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 300 flight time total : 10000 flight time type : 1600
ASRS Report	377636
Events
Anomaly	inflight encounter other non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

On departure, given lga 7 departure/whitestone climb. Takeoff and cleanup normal. At approximately 4000 ft MSL, we hit noticeable jet wash. We were then given a climb to 7000 ft. We looked outside for possible source of jet wash and attention was diverted to outside and from SID and I missed the requirement to turn 040 degrees at 2.5 DME/lga. At approximately 8- 9 DME/lga, I realized I was late on turning and initiated the turn. Departure control then asked what departure we were given. He then gave us vectors to complete the departure. Problem areas: 1) jet wash distraction and unusual 'climb to' 7000 ft. 2) minimum crew rest. We were late night before due to thunderstorms. We were given minimum rest 9 hour 15 min block-to-block with departure subsequently delayed in the morning. This was second straight night we were late and had to deal with thunderstorms and WX. The van to our layover hotel was 30 mins late. We were tired but both captain and first officer felt safe to fly. Both night arrs were late night.

Original NASA ASRS Text

Title: DEP DC9 FLC FAILS TO MAKE THE TURN TO 040 DEGS ON THE LGA DEP PROC WHEN THEY ARE DISTR BY SOME FORM OF A TURB ENCOUNTER. DEP CTLR CATCHES THEIR OVERSIGHT AFTER 1 MIN.

Narrative: ON DEP, GIVEN LGA 7 DEP/WHITESTONE CLB. TKOF AND CLEANUP NORMAL. AT APPROX 4000 FT MSL, WE HIT NOTICEABLE JET WASH. WE WERE THEN GIVEN A CLB TO 7000 FT. WE LOOKED OUTSIDE FOR POSSIBLE SOURCE OF JET WASH AND ATTN WAS DIVERTED TO OUTSIDE AND FROM SID AND I MISSED THE REQUIREMENT TO TURN 040 DEGS AT 2.5 DME/LGA. AT APPROX 8- 9 DME/LGA, I REALIZED I WAS LATE ON TURNING AND INITIATED THE TURN. DEP CTL THEN ASKED WHAT DEP WE WERE GIVEN. HE THEN GAVE US VECTORS TO COMPLETE THE DEP. PROB AREAS: 1) JET WASH DISTR AND UNUSUAL 'CLB TO' 7000 FT. 2) MINIMUM CREW REST. WE WERE LATE NIGHT BEFORE DUE TO TSTMS. WE WERE GIVEN MINIMUM REST 9 HR 15 MIN BLOCK-TO-BLOCK WITH DEP SUBSEQUENTLY DELAYED IN THE MORNING. THIS WAS SECOND STRAIGHT NIGHT WE WERE LATE AND HAD TO DEAL WITH TSTMS AND WX. THE VAN TO OUR LAYOVER HOTEL WAS 30 MINS LATE. WE WERE TIRED BUT BOTH CAPT AND FO FELT SAFE TO FLY. BOTH NIGHT ARRS WERE LATE NIGHT.

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.