The pilot of a light twin taxied without a clearance during ATCT operation. The pilot thought that h...

Attributes
ACN	305382
Time
Date	199505
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : det
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : elm
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 15 flight time total : 1100
ASRS Report	305382
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	non adherence : far
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Filed IFR flight plan. FSS requested motown 8 departure layne, direct mbs V133 tvc. At around XA30 EDT, listened to ATIS (133.0). Contacted ground control (121.9). IFR det to tvc. Ground control acknowledged and then seemed to have forgotten me. Then ground control came back on 121.9 'everybody listen up and come up on tower 121.3.' contacted tower on 121.3 and requested IFR clearance det-tvc. He then gave me my clearance. I read back clearance, heard 'readback correct.' I then thought he said taxi runway 15. I started to taxi, the controller said to turn right onto ramp and hold, that he had not given me permission to taxi. I apologized. He said no problem, but not to taxi without permission. He then gave me taxi clearance to runway 15. After runup, called and said ready to go, cleared me for takeoff 'without delay, landing traffic.' I do not believe that 1 person can handle ground, give IFR/VFR clrncs, taxi clrncs for incoming and outgoing traffic, and control landing and departing traffic on a VFR day at peak hours in a metropolitan area like det airport in a safe and orderly manner for all parties involved.

Original NASA ASRS Text

Title: THE PLT OF A LIGHT TWIN TAXIED WITHOUT A CLRNC DURING ATCT OP. THE PLT THOUGHT THAT HE HEARD TWR INSTRUCTIONS TO TAXI.

Narrative: FILED IFR FLT PLAN. FSS REQUESTED MOTOWN 8 DEP LAYNE, DIRECT MBS V133 TVC. AT AROUND XA30 EDT, LISTENED TO ATIS (133.0). CONTACTED GND CTL (121.9). IFR DET TO TVC. GND CTL ACKNOWLEDGED AND THEN SEEMED TO HAVE FORGOTTEN ME. THEN GND CTL CAME BACK ON 121.9 'EVERYBODY LISTEN UP AND COME UP ON TWR 121.3.' CONTACTED TWR ON 121.3 AND REQUESTED IFR CLRNC DET-TVC. HE THEN GAVE ME MY CLRNC. I READ BACK CLRNC, HEARD 'READBACK CORRECT.' I THEN THOUGHT HE SAID TAXI RWY 15. I STARTED TO TAXI, THE CTLR SAID TO TURN R ONTO RAMP AND HOLD, THAT HE HAD NOT GIVEN ME PERMISSION TO TAXI. I APOLOGIZED. HE SAID NO PROB, BUT NOT TO TAXI WITHOUT PERMISSION. HE THEN GAVE ME TAXI CLRNC TO RWY 15. AFTER RUNUP, CALLED AND SAID READY TO GO, CLRED ME FOR TKOF 'WITHOUT DELAY, LNDG TFC.' I DO NOT BELIEVE THAT 1 PERSON CAN HANDLE GND, GIVE IFR/VFR CLRNCS, TAXI CLRNCS FOR INCOMING AND OUTGOING TFC, AND CTL LNDG AND DEPARTING TFC ON A VFR DAY AT PEAK HRS IN A METRO AREA LIKE DET ARPT IN A SAFE AND ORDERLY MANNER FOR ALL PARTIES INVOLVED.

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.

The pilot of a light twin taxied without a clearance during ATCT operation. The pilot thought that he heard tower instructions to taxi.