ATC advises low altitude alert activated by medium large transport on lda approach.

Attributes
ACN	131362
Time
Date	198912
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sna
State Reference	CA
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sna tower : cmh
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 14000 flight time type : 2000
ASRS Report	131362
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Approach advised of a low altitude alert. We were asked if we had the airport in sight and responded in the negative. Our altitude was 1600' that specified on the approach plate for the approach at our location. Again approach advised of a low altitude alert and indicated our altitude should be 2600'. 2000' is the altitude on the ILS approach. I believe the controller forgot we were making an approach using the lda-DME and not the ILS which was OTS. His insistence about being at 2600' got our attention, however we did complete the approach as published.

Original NASA ASRS Text

Title: ATC ADVISES LOW ALT ALERT ACTIVATED BY MLG ON LDA APCH.

Narrative: APCH ADVISED OF A LOW ALT ALERT. WE WERE ASKED IF WE HAD THE ARPT IN SIGHT AND RESPONDED IN THE NEGATIVE. OUR ALT WAS 1600' THAT SPECIFIED ON THE APCH PLATE FOR THE APCH AT OUR LOCATION. AGAIN APCH ADVISED OF A LOW ALT ALERT AND INDICATED OUR ALT SHOULD BE 2600'. 2000' IS THE ALT ON THE ILS APCH. I BELIEVE THE CTLR FORGOT WE WERE MAKING AN APCH USING THE LDA-DME AND NOT THE ILS WHICH WAS OTS. HIS INSISTENCE ABOUT BEING AT 2600' GOT OUR ATTN, HOWEVER WE DID COMPLETE THE APCH AS PUBLISHED.

Data retrieved from NASA's ASRS site as of August 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.