MD80 crew may have landed at san without clearance.

Attributes
ACN	497990
Time
Date	200101
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : san.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : sct.tracon tower : san.tower tower : cys.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils other localizer
Flight Phase	landing : roll
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 : 13150 flight time type : 9000
ASRS Report	497990
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	incursion : landing without clearance non adherence : far non adherence : clearance non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Vectors to visual for runway 27 at san, approach control cleared our aircraft for the visual approach to runway 27. Then there was conversation between approach and another aircraft regarding WX. Somewhere during this discussion, we landed on runway 27, but not sure we had received clearance from the tower. Bottom line: distraction from normal sequence lead to possible screw up. 2 wrongs don't make it right!

Original NASA ASRS Text

Title: MD80 CREW MAY HAVE LANDED AT SAN WITHOUT CLRNC.

Narrative: VECTORS TO VISUAL FOR RWY 27 AT SAN, APCH CTL CLRED OUR ACFT FOR THE VISUAL APCH TO RWY 27. THEN THERE WAS CONVERSATION BTWN APCH AND ANOTHER ACFT REGARDING WX. SOMEWHERE DURING THIS DISCUSSION, WE LANDED ON RWY 27, BUT NOT SURE WE HAD RECEIVED CLRNC FROM THE TWR. BOTTOM LINE: DISTR FROM NORMAL SEQUENCE LEAD TO POSSIBLE SCREW UP. 2 WRONGS DON'T MAKE IT RIGHT!

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.