A lear 60 pilot received conflicting information on the runway gradient at bng.

Attributes
ACN	458268
Time
Date	199912
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bng.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : cvg.tracon
Operator	general aviation : corporate
Make Model Name	Learjet 60
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	458268
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

A question has risen about the performance data on the LR60 for runway gradient. The LR60 is certified to operate from runways with a maximum of 2.2% gradient. The issue is that there is no published gradient for runway 8/26 at bng. At the same time, there is conflicting information about the gradient at bng. A local part 135 operator told me the gradient was 2.1%. Other information indicates the gradient may be 2.4%. Since neither the FAA's AFD nor commercial chart publishes any runway gradient information, the actual gradient cannot be verified. Upon departure from bng, I believed was being operated by me in accordance with appropriate far's and the FAA approved airplane flight manual.

Original NASA ASRS Text

Title: A LEAR 60 PLT RECEIVED CONFLICTING INFO ON THE RWY GRADIENT AT BNG.

Narrative: A QUESTION HAS RISEN ABOUT THE PERFORMANCE DATA ON THE LR60 FOR RWY GRADIENT. THE LR60 IS CERTIFIED TO OPERATE FROM RWYS WITH A MAX OF 2.2% GRADIENT. THE ISSUE IS THAT THERE IS NO PUBLISHED GRADIENT FOR RWY 8/26 AT BNG. AT THE SAME TIME, THERE IS CONFLICTING INFO ABOUT THE GRADIENT AT BNG. A LCL PART 135 OPERATOR TOLD ME THE GRADIENT WAS 2.1%. OTHER INFO INDICATES THE GRADIENT MAY BE 2.4%. SINCE NEITHER THE FAA'S AFD NOR COMMERCIAL CHART PUBLISHES ANY RWY GRADIENT INFO, THE ACTUAL GRADIENT CANNOT BE VERIFIED. UPON DEP FROM BNG, I BELIEVED WAS BEING OPERATED BY ME IN ACCORDANCE WITH APPROPRIATE FAR'S AND THE FAA APPROVED AIRPLANE FLT MANUAL.

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.