<< >> NASA ASRS Report 426750, January 1999

The air carrier flight crew of a B757 deviated around a line of thunderstorms and exceeded the 162 NM overwater limitation for domestic operations.

Attributes
ACN	426750
Time
Date	199901
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cew
State Reference	FL
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : jfk
Operator	common carrier : air carrier
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : other oceanic enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
ASRS Report	426750
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	426527
Events
Anomaly	inflight encounter : weather non adherence : far other anomaly other
Independent Detector	other flight crewa
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

After deviating for an extensive line of thunderstorms, crew noticed that the 162 NM restr line for overwater crews may have been exceeded. Supplemental information from acn 426527: after going through the only descent break in the line, I realized I was a little south of the 162 mi limit. I crossed the line and proceeded back to within the 162 mi range. The aircraft was overwater equipped, but the crew was domestic. I did not feel it would have been safe to attempt to deviate between the individual cells of such an active WX system.

Related reports:

• Commuter flight crew exceeds 8 hour limitation due thunderst...

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Original NASA ASRS Text

Title: THE ACR FLC OF A B757 DEVIATED AROUND A LINE OF TSTMS AND EXCEEDED THE 162 NM OVERWATER LIMITATION FOR DOMESTIC OPS.

Narrative: AFTER DEVIATING FOR AN EXTENSIVE LINE OF TSTMS, CREW NOTICED THAT THE 162 NM RESTR LINE FOR OVERWATER CREWS MAY HAVE BEEN EXCEEDED. SUPPLEMENTAL INFO FROM ACN 426527: AFTER GOING THROUGH THE ONLY DSCNT BREAK IN THE LINE, I REALIZED I WAS A LITTLE S OF THE 162 MI LIMIT. I CROSSED THE LINE AND PROCEEDED BACK TO WITHIN THE 162 MI RANGE. THE ACFT WAS OVERWATER EQUIPPED, BUT THE CREW WAS DOMESTIC. I DID NOT FEEL IT WOULD HAVE BEEN SAFE TO ATTEMPT TO DEVIATE BTWN THE INDIVIDUAL CELLS OF SUCH AN ACTIVE WX SYS.

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.