<< >> NASA ASRS Report 331679, March 1996

Approaching a line of WX 144 mi north of kraft, WX radar appeared to fail. The reporter requested and received clearance to deviate west of course about 75 mi, then 125 mi and then when that was not enough declared an emergency to deviate as necessary. The reporter did not think he exceeded the 125 mi before he turned back to rejoin amber 300 about 30 mi south of kraft. The rest of the flight was normal.

Attributes
ACN	331679
Time
Date	199603
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tjzs
State Reference	PR
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : tjzs
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other other
Route In Use	enroute : atlantic enroute airway : tjzs
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 6500 flight time type : 2500
ASRS Report	331679
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe inflight encounter : weather other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Weather

Narrative:

Approaching line of WX north of kraft, WX radar appeared to fail. Requested and received clearance to deviate up to 75 NM west of course. It became clear that additional deviation would be required. As we approached the 75 NM limit, we requested and received clearance to deviate up to 125 NM west of course. At this time we declared an emergency because we thought that we might need to exceed our clearance limit. I don't think that we did go beyond our clearance limit. After deviation we returned on course approximately 30 NM south of kraft. The rest of the flight was normal.

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Original NASA ASRS Text

Title: APCHING A LINE OF WX 144 MI N OF KRAFT, WX RADAR APPEARED TO FAIL. THE RPTR REQUESTED AND RECEIVED CLRNC TO DEVIATE W OF COURSE ABOUT 75 MI, THEN 125 MI AND THEN WHEN THAT WAS NOT ENOUGH DECLARED AN EMER TO DEVIATE AS NECESSARY. THE RPTR DID NOT THINK HE EXCEEDED THE 125 MI BEFORE HE TURNED BACK TO REJOIN AMBER 300 ABOUT 30 MI S OF KRAFT. THE REST OF THE FLT WAS NORMAL.

Narrative: APCHING LINE OF WX N OF KRAFT, WX RADAR APPEARED TO FAIL. REQUESTED AND RECEIVED CLRNC TO DEVIATE UP TO 75 NM W OF COURSE. IT BECAME CLR THAT ADDITIONAL DEV WOULD BE REQUIRED. AS WE APCHED THE 75 NM LIMIT, WE REQUESTED AND RECEIVED CLRNC TO DEVIATE UP TO 125 NM W OF COURSE. AT THIS TIME WE DECLARED AN EMER BECAUSE WE THOUGHT THAT WE MIGHT NEED TO EXCEED OUR CLRNC LIMIT. I DON'T THINK THAT WE DID GO BEYOND OUR CLRNC LIMIT. AFTER DEV WE RETURNED ON COURSE APPROX 30 NM S OF KRAFT. THE REST OF THE FLT WAS NORMAL.

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.