<< >> NASA ASRS Report 589634, August 2003

B757-200 crew was required to use emergency authority/authorized to deviate thunderstorms in new york oceanic airspace.

Attributes
ACN	589634
Time
Date	200308
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : noogy
State Reference	NY
Altitude	msl single value : 35000
Environment
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute airway : a554.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	inflight encounter : weather inflight encounter other other anomaly other other spatial deviation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : returned to intended or assigned course flight crew : declared emergency other
Supplementary
Problem Areas	Weather
Primary Problem	Weather

Narrative:

Deviation from assigned route for WX. At approximately XA55Z at FL350 along A554, I asked the first officer to request from ATC 25 mi eastward deviation due to WX. Shortly thereafter, ATC returned with 'unable east, but able west deviation.' since we had hazardous WX in front and off our right (west) we were unable to deviate to the west. The cells were big, and tops much higher than FL350. I then had the first officer inform ATC that I was exercising my captain's 'emergency authority/authorized' to deviate to the east up to 20 mi. This was approaching noogy intersection. We then deviated almost 20 NM off to the left, and returned on course over keegan intersection. We reported on course over keegan, and updated our ETA for lamer. We lost 1 min off our original estimate. Lamer is compulsory and a fir boundary. We saw no traffic during this time, and none showed on TCASII.

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Original NASA ASRS Text

Title: B757-200 CREW WAS REQUIRED TO USE EMER AUTH TO DEVIATE TSTMS IN NEW YORK OCEANIC AIRSPACE.

Narrative: DEV FROM ASSIGNED RTE FOR WX. AT APPROX XA55Z AT FL350 ALONG A554, I ASKED THE FO TO REQUEST FROM ATC 25 MI EASTWARD DEV DUE TO WX. SHORTLY THEREAFTER, ATC RETURNED WITH 'UNABLE E, BUT ABLE W DEV.' SINCE WE HAD HAZARDOUS WX IN FRONT AND OFF OUR R (W) WE WERE UNABLE TO DEVIATE TO THE W. THE CELLS WERE BIG, AND TOPS MUCH HIGHER THAN FL350. I THEN HAD THE FO INFORM ATC THAT I WAS EXERCISING MY CAPT'S 'EMER AUTH' TO DEVIATE TO THE E UP TO 20 MI. THIS WAS APCHING NOOGY INTXN. WE THEN DEVIATED ALMOST 20 NM OFF TO THE L, AND RETURNED ON COURSE OVER KEEGAN INTXN. WE RPTED ON COURSE OVER KEEGAN, AND UPDATED OUR ETA FOR LAMER. WE LOST 1 MIN OFF OUR ORIGINAL ESTIMATE. LAMER IS COMPULSORY AND A FIR BOUNDARY. WE SAW NO TFC DURING THIS TIME, AND NONE SHOWED ON TCASII.

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.