S80 descends to FL180 to escape the ravages of en route turbulence 135 mi northeast of orl, fl, on amber route 1. The crew then discovers that FL250 is the minimum altitude for the route as their navigation radios need FL250 for VOR reception and navigation capability. FL250 is requested and obtained.

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Attributes
ACN	391000
Time
Date	199801
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : orl
State Reference	FL
Altitude	msl bound lower : 18000 msl bound upper : 25000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other descent other
Route In Use	enroute : atlantic enroute : other oceanic enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	391000
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	391001
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

ATC facility: ZMA. Location: south of torry, north of hobee, west of AR1. Encountered moderate turbulence which only worsened after descent to FL260. Center cleared us to FL180 where we were in smooth air. We checked part 1 and realized our minimum altitude with minimum overwater route equipment was FL250. We climbed back to FL250.

Original NASA ASRS Text

Title: S80 DSNDS TO FL180 TO ESCAPE THE RAVAGES OF ENRTE TURB 135 MI NE OF ORL, FL, ON AMBER RTE 1. THE CREW THEN DISCOVERS THAT FL250 IS THE MINIMUM ALT FOR THE RTE AS THEIR NAV RADIOS NEED FL250 FOR VOR RECEPTION AND NAV CAPABILITY. FL250 IS REQUESTED AND OBTAINED.

Narrative: ATC FACILITY: ZMA. LOCATION: S OF TORRY, N OF HOBEE, W OF AR1. ENCOUNTERED MODERATE TURB WHICH ONLY WORSENED AFTER DSCNT TO FL260. CTR CLRED US TO FL180 WHERE WE WERE IN SMOOTH AIR. WE CHKED PART 1 AND REALIZED OUR MINIMUM ALT WITH MINIMUM OVERWATER RTE EQUIP WAS FL250. WE CLBED BACK TO FL250.

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.