An SR22 pilot failed to note the autopilot had disconnected upon intercepting the ILS to crq. ATC re...

Attributes
ACN	1002317
Time
Date	201203
Local Time Of Day	1201-1800
Place
Locale Reference	CRQ.Airport
State Reference	CA
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	SR22
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Autopilot
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT

Narrative:

I was flying in IMC intending the ILS approach at crq. I was receiving vectors and was flying with the autopilot engaged. Upon reaching the approach path; I engaged the navigation/appr function on the autopilot. The autopilot indicated that it was engaged. The plane began its turn inbound and I started a descent having become established on course. The autopilot disengaged without an audible alert and I didn't immediately realize it and ended up off course.at that point I was contacted by ATC with an altitude alert and asked if I intended to try to complete the approach. I said I was having a problem. They gave me a climb back to 4;000 ft and a new heading. I went where directed and was vectored back for the approach which I then hand flew without further incident.

Original NASA ASRS Text

Title: An SR22 pilot failed to note the autopilot had disconnected upon intercepting the ILS to CRQ. ATC received an altitude alert and provided vectors back for a successful hand flown ILS.

Narrative: I was flying in IMC intending the ILS approach at CRQ. I was receiving vectors and was flying with the autopilot engaged. Upon reaching the approach path; I engaged the NAV/APPR function on the autopilot. The autopilot indicated that it was engaged. The plane began its turn inbound and I started a descent having become established on course. The autopilot disengaged without an audible alert and I didn't immediately realize it and ended up off course.At that point I was contacted by ATC with an altitude alert and asked if I intended to try to complete the approach. I said I was having a problem. They gave me a climb back to 4;000 FT and a new heading. I went where directed and was vectored back for the approach which I then hand flew without further incident.

Data retrieved from NASA's ASRS site as of July 2013 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.

An SR22 pilot failed to note the autopilot had disconnected upon intercepting the ILS to crq. ATC received an altitude alert and provided vectors back for a successful hand flown ILS.