CL60 crew flew the aircraft with an improperly MEL'ed inoperative nosewheel steering failure.

Attributes
ACN	561686
Time
Date	200210
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz1.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Challenger CL601
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6800 flight time type : 1700
ASRS Report	561686
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : non compliance with mel non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : lndg gear position indicator other flight crewa other flight crewb
Resolutory Action	other
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : repair
Supplementary
Problem Areas	Company Flight Crew Human Performance Aircraft
Primary Problem	Company

Narrative:

Nosewheel steering failure on landing at ZZZ. Per MEL, ferried aircraft back home without passenger. When arriving at ZZZ1, upon gear extension, nose gear would not come down. Using alternate gear extension procedures, gear locked down and landing made. No problems. It was discovered that everyone in our operation was misinterping the MEL. Had we fully understood it and had all supplemental information been available to us, the ferry flight home would not have been made and the landing gear problem would not have happened. We (the entire flight department) are reviewing all MEL procedures so we fully understand what we can and cannot fly with. FAA and NTSB were contacted to see if reports needed to be filed, and they declined. No investigation regarding nose gear problem.

Original NASA ASRS Text

Title: CL60 CREW FLEW THE ACFT WITH AN IMPROPERLY MEL'ED INOP NOSEWHEEL STEERING FAILURE.

Narrative: NOSEWHEEL STEERING FAILURE ON LNDG AT ZZZ. PER MEL, FERRIED ACFT BACK HOME WITHOUT PAX. WHEN ARRIVING AT ZZZ1, UPON GEAR EXTENSION, NOSE GEAR WOULD NOT COME DOWN. USING ALTERNATE GEAR EXTENSION PROCS, GEAR LOCKED DOWN AND LNDG MADE. NO PROBS. IT WAS DISCOVERED THAT EVERYONE IN OUR OP WAS MISINTERPING THE MEL. HAD WE FULLY UNDERSTOOD IT AND HAD ALL SUPPLEMENTAL INFO BEEN AVAILABLE TO US, THE FERRY FLT HOME WOULD NOT HAVE BEEN MADE AND THE LNDG GEAR PROB WOULD NOT HAVE HAPPENED. WE (THE ENTIRE FLT DEPT) ARE REVIEWING ALL MEL PROCS SO WE FULLY UNDERSTAND WHAT WE CAN AND CANNOT FLY WITH. FAA AND NTSB WERE CONTACTED TO SEE IF RPTS NEEDED TO BE FILED, AND THEY DECLINED. NO INVESTIGATION REGARDING NOSE GEAR PROB.

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.