CRJ200 flight crew experiences a 'prox syst chan' master caution during initial descent and complies...

Narrative:

At FL260 and on the arrival; we received a 'prox syst chan' master caution message. [We] ran QRH and circled southwest of airport with the help of ATC to accomplish checklist. After successful completion of checklist and coordination with dispatch and the flight attendant; an emergency was declared. All events from that point to the landing were normal. After landing; nose wheel steering was lost and had to be towed to gate. Something of note here is that the QRH is misleading when running this checklist. Events occurred that were not made aware to the crew. [For example]; the QRH makes no mention of the egpws 'too low; gear' [warning] when you successfully complete the first 'tree' in the checklist to the first end point. [This] needs to be addressed! My guess is maybe the QRH does not address which channel or part of the proximity system that has failed; therefore you can still get erroneous aural warnings. [This was] very alarming to the crew!

Original NASA ASRS Text

Title: CRJ200 flight crew experiences a 'Prox Syst Chan' master caution during initial descent and complies with QRH procedures. During final approach; 'too low; gear' is annunciated although the gear is down. After landing; the nose wheel steering is found to be inoperative.

Narrative: At FL260 and on the arrival; we received a 'Prox Syst Chan' master caution message. [We] ran QRH and circled southwest of airport with the help of ATC to accomplish checklist. After successful completion of checklist and coordination with Dispatch and the Flight Attendant; an emergency was declared. All events from that point to the landing were normal. After landing; nose wheel steering was lost and had to be towed to gate. Something of note here is that the QRH is misleading when running this checklist. Events occurred that were not made aware to the crew. [For example]; the QRH makes no mention of the EGPWS 'too low; gear' [warning] when you successfully complete the first 'tree' in the checklist to the first end point. [This] needs to be addressed! My guess is maybe the QRH does not address which channel or part of the proximity system that has failed; therefore you can still get erroneous aural warnings. [This was] very alarming to the crew!

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	977695
Time
Date	201111
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Nosewheel Steering
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Less Severe

CRJ200 flight crew experiences a 'prox syst chan' master caution during initial descent and complies with QRH procedures. During final approach; 'too low; gear' is annunciated although the gear is down. After landing; the nose wheel steering is found to be inoperative.