Reporter exercised emergency authority/authorized to deviation off route and altitude to avoid thund...

Attributes
ACN	298171
Time
Date	199503
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : hnl
State Reference	HI
Altitude	msl bound lower : 36000 msl bound upper : 38500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other other
Route In Use	enroute : other oceanic enroute : pacific enroute airway : zoa
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 140 flight time total : 20000 flight time type : 2700
ASRS Report	298171
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	flight crew : exited adverse environment flight crew : declared emergency flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Weather

Narrative:

Captain's emergency authority/authorized was used to avoid severe WX. The WX was located along oceanic route A332 approximately 110 NM east of absol to approximately 4 NM west of absol. 2 deviations were necessary. The first deviation occurred approximately 130 NM east of absol XA17Z. We offset 6.5 NM north of A332 and climbed 500 ft to FL365 for 6 min. Then back to course and altitude. The second deviation occurred approximately 20 NM east of absol XA35Z. We offset 15 NM south of A332 climbed 500 ft to FL385 for 13 min, then back to course and altitude. In both deviations we were not able to receive ATC clearance and followed emergency. In flight contingencies and WX deviation procedures.

Original NASA ASRS Text

Title: RPTR EXERCISED EMER AUTH TO DEV OFF RTE AND ALT TO AVOID TSTMS.

Narrative: CAPT'S EMER AUTH WAS USED TO AVOID SEVERE WX. THE WX WAS LOCATED ALONG OCEANIC RTE A332 APPROX 110 NM E OF ABSOL TO APPROX 4 NM W OF ABSOL. 2 DEVS WERE NECESSARY. THE FIRST DEV OCCURRED APPROX 130 NM E OF ABSOL XA17Z. WE OFFSET 6.5 NM N OF A332 AND CLBED 500 FT TO FL365 FOR 6 MIN. THEN BACK TO COURSE AND ALT. THE SECOND DEV OCCURRED APPROX 20 NM E OF ABSOL XA35Z. WE OFFSET 15 NM S OF A332 CLBED 500 FT TO FL385 FOR 13 MIN, THEN BACK TO COURSE AND ALT. IN BOTH DEVS WE WERE NOT ABLE TO RECEIVE ATC CLRNC AND FOLLOWED EMER. IN FLT CONTINGENCIES AND WX DEV PROCS.

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.

Reporter exercised emergency authority/authorized to deviation off route and altitude to avoid thunderstorms.