Cpr AC69 PIC descends to MDA on VOR approach before he was cleared for an approach. The approach controller had advised him to expect a visual approach. Report does not define the terminology that led the reporter down the wrong path.

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Attributes
ACN	380270
Time
Date	199709
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : n14
State Reference	NJ
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : wri
Operator	general aviation : corporate
Make Model Name	Turbo (Jet) Prop
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : straight in arrival other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 8400 flight time type : 1000
ASRS Report	380270
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other controllera
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:

Told to expect visual approach. I requested approach from ponde. I thought I was cleared for approach. Controller asked for altitude and I reported descending to 800 ft (MDA). He stated I hadn't been cleared to descend. I climbed back to 1600 ft and reported field in sight. Confusion with what I requested (VOR from ponde intersection) and what controllers thought I was flying (visual approach). VFR WX. No conflict with other traffic.

Original NASA ASRS Text

Title: CPR AC69 PIC DSNDS TO MDA ON VOR APCH BEFORE HE WAS CLRED FOR AN APCH. THE APCH CTLR HAD ADVISED HIM TO EXPECT A VISUAL APCH. RPT DOES NOT DEFINE THE TERMINOLOGY THAT LED THE RPTR DOWN THE WRONG PATH.

Narrative: TOLD TO EXPECT VISUAL APCH. I REQUESTED APCH FROM PONDE. I THOUGHT I WAS CLRED FOR APCH. CTLR ASKED FOR ALT AND I RPTED DSNDING TO 800 FT (MDA). HE STATED I HADN'T BEEN CLRED TO DSND. I CLBED BACK TO 1600 FT AND RPTED FIELD IN SIGHT. CONFUSION WITH WHAT I REQUESTED (VOR FROM PONDE INTXN) AND WHAT CTLRS THOUGHT I WAS FLYING (VISUAL APCH). VFR WX. NO CONFLICT WITH OTHER TFC.

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