Overwater B767-300 must declare emergency to circumnavigate weather in class ii airspace.

Attributes
ACN	786110
Time
Date	200805
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.artcc
State Reference	US
Altitude	msl single value : 38000
Environment
Weather Elements	Thunderstorm
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18000 flight time type : 9000
ASRS Report	786110
Events
Anomaly	inflight encounter : weather
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Weather ATC Human Performance
Primary Problem	Weather

Narrative:

Level at FL380 talking to ARTCC radio on HF; requested a deviation for a strong line of thunderstorms. After about 5 mins; requested again saying I would need to use emergency authority/authorized to go 20 mi west of storms soon. Radio said stand by and she would try again. Approaching WX; I called; declared an emergency; and started to go around the storms. After a few mins; she came back with a clearance to FL370 and ok to deviate.

Original NASA ASRS Text

Title: OVERWATER B767-300 MUST DECLARE EMERGENCY TO CIRCUMNAVIGATE WEATHER IN CLASS II AIRSPACE.

Narrative: LEVEL AT FL380 TALKING TO ARTCC RADIO ON HF; REQUESTED A DEV FOR A STRONG LINE OF TSTMS. AFTER ABOUT 5 MINS; REQUESTED AGAIN SAYING I WOULD NEED TO USE EMER AUTH TO GO 20 MI W OF STORMS SOON. RADIO SAID STAND BY AND SHE WOULD TRY AGAIN. APCHING WX; I CALLED; DECLARED AN EMER; AND STARTED TO GO AROUND THE STORMS. AFTER A FEW MINS; SHE CAME BACK WITH A CLRNC TO FL370 AND OK TO DEVIATE.

Data retrieved from NASA's ASRS site as of May 2009 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.