<< >> NASA ASRS Report 298144, March 1995

Emergency declared -- air carrier captain uses his emergency authority/authorized to avoid a thunderstorm when he is unable to contact the ARTCC controller over the atlantic.

Attributes
ACN	298144
Time
Date	199503
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : kbv
State Reference	FO
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : zny tower : pvr
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	298144
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

Flight on A300 sbound 100 mi north of elwod intersection approximately XA25 zulu -- approaching line of heavy thunderstorm -- unable to contact new york commercial radio operator due severe frequency congestion. Flight was forced to exercise captain's emergency authority/authorized as well as request an amended clearance due to the immediacy of thunderstorm penetration if same course flown. Emergency declaration and position and intentions were broadcast on ny commercial radio as well as 121.5. An amended clearance was received a short time later. Note altitude change requests made earlier to avoid WX were denied.

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Original NASA ASRS Text

Title: EMER DECLARED -- ACR CAPT USES HIS EMER AUTH TO AVOID A TSTM WHEN HE IS UNABLE TO CONTACT THE ARTCC CTLR OVER THE ATLANTIC.

Narrative: FLT ON A300 SBOUND 100 MI N OF ELWOD INTXN APPROX XA25 ZULU -- APCHING LINE OF HVY TSTM -- UNABLE TO CONTACT NEW YORK COMMERCIAL RADIO OPERATOR DUE SEVERE FREQ CONGESTION. FLT WAS FORCED TO EXERCISE CAPT'S EMER AUTH AS WELL AS REQUEST AN AMENDED CLRNC DUE TO THE IMMEDIACY OF TSTM PENETRATION IF SAME COURSE FLOWN. EMER DECLARATION AND POS AND INTENTIONS WERE BROADCAST ON NY COMMERCIAL RADIO AS WELL AS 121.5. AN AMENDED CLRNC WAS RECEIVED A SHORT TIME LATER. NOTE ALT CHANGE REQUESTS MADE EARLIER TO AVOID WX WERE DENIED.

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.