Low altitude warning for small transport on IMC approach.

Attributes
ACN	122881
Time
Date	198909
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : orl
State Reference	FL
Altitude	msl bound lower : 520 msl bound upper : 520
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : orl
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 1000
ASRS Report	122881
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	conflict : ground less severe non adherence : published procedure non adherence : far
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Inbound to orlando executive about 25 mi out approach tells flight ahead of me that an 'small transport will be passing to take the backcourse approach first.' approach then asked me to 'keep up the speed.' approach flew me through the localizer and told me I was over maryb (6 DME fix) with full scale deflection), and cleared me for the approach. I got on the localizer ok (real quick). In my hasty review of the approach chart about 40 mi out, I noted the maximum crossing altitude of 1160' on the localizer at 4 DME and made a mental note to get to MDA (520') as soon as possible after maryb. Everything happened so fast when the tower called and said that had an altitude alert. I was at minimums and didn't know what the problem was. Everything checked out in the cockpit--both altimeters and radio altitude confirmed 520' MDA. After landing tower asked if my approach plate was current. I answered yes, but after calling the next day to question them on the approach, I find I was operating with an out of date plate.

Original NASA ASRS Text

Title: LOW ALT WARNING FOR SMT ON IMC APCH.

Narrative: INBND TO ORLANDO EXECUTIVE ABOUT 25 MI OUT APCH TELLS FLT AHEAD OF ME THAT AN 'SMT WILL BE PASSING TO TAKE THE BACKCOURSE APCH FIRST.' APCH THEN ASKED ME TO 'KEEP UP THE SPD.' APCH FLEW ME THROUGH THE LOC AND TOLD ME I WAS OVER MARYB (6 DME FIX) WITH FULL SCALE DEFLECTION), AND CLRED ME FOR THE APCH. I GOT ON THE LOC OK (REAL QUICK). IN MY HASTY REVIEW OF THE APCH CHART ABOUT 40 MI OUT, I NOTED THE MAX XING ALT OF 1160' ON THE LOC AT 4 DME AND MADE A MENTAL NOTE TO GET TO MDA (520') ASAP AFTER MARYB. EVERYTHING HAPPENED SO FAST WHEN THE TWR CALLED AND SAID THAT HAD AN ALT ALERT. I WAS AT MINIMUMS AND DIDN'T KNOW WHAT THE PROB WAS. EVERYTHING CHKED OUT IN THE COCKPIT--BOTH ALTIMETERS AND RADIO ALT CONFIRMED 520' MDA. AFTER LNDG TWR ASKED IF MY APCH PLATE WAS CURRENT. I ANSWERED YES, BUT AFTER CALLING THE NEXT DAY TO QUESTION THEM ON THE APCH, I FIND I WAS OPERATING WITH AN OUT OF DATE PLATE.

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.