Commuter flight crew lands without clearance.

Attributes
ACN	146323
Time
Date	199005
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sps
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sps artcc : sea
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach landing other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4500
ASRS Report	146323
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	146321
Events
Anomaly	incursion : landing without clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were given a visual approach clearance by sheppard approach and then handed off to tower. On initial contact with tower, we were told to report a right base. No landing clearance was issued at that time. The traffic pattern for runway 17 requires a specific ground track to avoid over flying certain areas of the military base. This includes a very tight turn from downwind to base to final. Extreme vigilance outside is necessary to avoid high speed aircraft. The workload including a tight turn, a crosswind and the normal cockpit duties resulted in missing the base leg call. We called tower for a wind check twice with no answer either time. At this point we were not aware we did not have landing clearance. After we had touched down the tower asked if we had radio problems and informed us we had landed with out clearance. We asked if there had been a traffic conflict or any other problem, they replied there was none.

Original NASA ASRS Text

Title: COMMUTER FLT CREW LANDS WITHOUT CLRNC.

Narrative: WE WERE GIVEN A VISUAL APCH CLRNC BY SHEPPARD APCH AND THEN HANDED OFF TO TWR. ON INITIAL CONTACT WITH TWR, WE WERE TOLD TO RPT A R BASE. NO LNDG CLRNC WAS ISSUED AT THAT TIME. THE TFC PATTERN FOR RWY 17 REQUIRES A SPECIFIC GND TRACK TO AVOID OVER FLYING CERTAIN AREAS OF THE MIL BASE. THIS INCLUDES A VERY TIGHT TURN FROM DOWNWIND TO BASE TO FINAL. EXTREME VIGILANCE OUTSIDE IS NECESSARY TO AVOID HIGH SPD ACFT. THE WORKLOAD INCLUDING A TIGHT TURN, A XWIND AND THE NORMAL COCKPIT DUTIES RESULTED IN MISSING THE BASE LEG CALL. WE CALLED TWR FOR A WIND CHK TWICE WITH NO ANSWER EITHER TIME. AT THIS POINT WE WERE NOT AWARE WE DID NOT HAVE LNDG CLRNC. AFTER WE HAD TOUCHED DOWN THE TWR ASKED IF WE HAD RADIO PROBS AND INFORMED US WE HAD LANDED WITH OUT CLRNC. WE ASKED IF THERE HAD BEEN A TFC CONFLICT OR ANY OTHER PROB, THEY REPLIED THERE WAS NONE.

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.