Failed to comply with clearance to maintain 3000' to the localizer glide slope intercept.

Attributes
ACN	100400
Time
Date	198812
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ogg
State Reference	HI
Altitude	agl bound lower : 2300 agl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ogg
Operator	common carrier : air taxi
Make Model Name	Small Transport
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 900
ASRS Report	100400
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Proceeding on V2 to camps to intercept localizer for runway 2 ILS approach in heavy rain. Cleared by approach from 5000 to 3000' MSL. Told by approach to maintain 3000' till intercepting localizer. I glanced at approach plate, saw the figure 2300 for the localizer approach and, being tired from flying heavy IFR all day, didn't rechk minimum altitudes and started descent. Realized at 2300' I was way below G/south and minimum altitude for that segment of approach. As I started to correct back to 3000' approach control advised me of the altitude and to correct situation, which of course I did. The obvious cause was pilot fatigue. The minimum altitude should have been checked and rechked by me. I knew I was tired. In the future that knowledge will set off mental alarms to avoid the above situation, which could have turned out to be lethal.

Original NASA ASRS Text

Title: FAILED TO COMPLY WITH CLRNC TO MAINTAIN 3000' TO THE LOCALIZER GLIDE SLOPE INTERCEPT.

Narrative: PROCEEDING ON V2 TO CAMPS TO INTERCEPT LOC FOR RWY 2 ILS APCH IN HEAVY RAIN. CLRED BY APCH FROM 5000 TO 3000' MSL. TOLD BY APCH TO MAINTAIN 3000' TILL INTERCEPTING LOC. I GLANCED AT APCH PLATE, SAW THE FIGURE 2300 FOR THE LOC APCH AND, BEING TIRED FROM FLYING HEAVY IFR ALL DAY, DIDN'T RECHK MINIMUM ALTS AND STARTED DSCNT. REALIZED AT 2300' I WAS WAY BELOW G/S AND MINIMUM ALT FOR THAT SEGMENT OF APCH. AS I STARTED TO CORRECT BACK TO 3000' APCH CTL ADVISED ME OF THE ALT AND TO CORRECT SITUATION, WHICH OF COURSE I DID. THE OBVIOUS CAUSE WAS PLT FATIGUE. THE MINIMUM ALT SHOULD HAVE BEEN CHKED AND RECHKED BY ME. I KNEW I WAS TIRED. IN THE FUTURE THAT KNOWLEDGE WILL SET OFF MENTAL ALARMS TO AVOID THE ABOVE SITUATION, WHICH COULD HAVE TURNED OUT TO BE LETHAL.

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.