Heading track deviation in proximity of thunderstorm activity in an overwater operation.

Attributes
ACN	273443
Time
Date	199406
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zny
State Reference	NY
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other other
Route In Use	enroute : atlantic enroute : other oceanic enroute airway : a300
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 6000
ASRS Report	273443
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

While sbound on A-300 south of champ intersection I heard aircraft on frequency talking about WX between krart and ender intxns and request deviation of WX. Therefore, when I noted WX on radar prior to ender, I requested a west deviation to avoid the WX ahead on A-300. My request was via ny radio on 6577 usb. My first request was plus/minus 15 mins prior to needed deviation. At plus/minus 10 mins prior to the WX, I called ny radio and asked about my clearance to deviation. He said he had not heard but that he would put in another request. When no word was received and prior to WX, I called ny radio and advised them I was exercising my captain's emergency authority to deviation 10 mi west of A-300. I also broadcast in the blind on 121.5 and 130.55 of my intentions (no aircraft on TCASII 30 mi range). After clear of WX and beginning turn to intercept A-300, I received clearance to deviation. Other than using my emergency authority, the trip was routine. The aircraft was in the clear during the diversion and well clear of thunderstorm near ender.

Original NASA ASRS Text

Title: HDG TRACK DEV IN PROX OF TSTM ACTIVITY IN AN OVERWATER OP.

Narrative: WHILE SBOUND ON A-300 S OF CHAMP INTXN I HEARD ACFT ON FREQ TALKING ABOUT WX BTWN KRART AND ENDER INTXNS AND REQUEST DEV OF WX. THEREFORE, WHEN I NOTED WX ON RADAR PRIOR TO ENDER, I REQUESTED A W DEV TO AVOID THE WX AHEAD ON A-300. MY REQUEST WAS VIA NY RADIO ON 6577 USB. MY FIRST REQUEST WAS PLUS/MINUS 15 MINS PRIOR TO NEEDED DEV. AT PLUS/MINUS 10 MINS PRIOR TO THE WX, I CALLED NY RADIO AND ASKED ABOUT MY CLRNC TO DEV. HE SAID HE HAD NOT HEARD BUT THAT HE WOULD PUT IN ANOTHER REQUEST. WHEN NO WORD WAS RECEIVED AND PRIOR TO WX, I CALLED NY RADIO AND ADVISED THEM I WAS EXERCISING MY CAPT'S EMER AUTHORITY TO DEV 10 MI W OF A-300. I ALSO BROADCAST IN THE BLIND ON 121.5 AND 130.55 OF MY INTENTIONS (NO ACFT ON TCASII 30 MI RANGE). AFTER CLR OF WX AND BEGINNING TURN TO INTERCEPT A-300, I RECEIVED CLRNC TO DEV. OTHER THAN USING MY EMER AUTHORITY, THE TRIP WAS ROUTINE. THE ACFT WAS IN THE CLR DURING THE DIVERSION AND WELL CLR OF TSTM NEAR ENDER.

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.