Medium large transport distraction by TCASII alert lands without clearance.

Attributes
ACN	260451
Time
Date	199401
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 0 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : sfo
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer pilot : instrument pilot : commercial
Experience	flight time last 90 days : 100
ASRS Report	260451
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : landing without clearance other anomaly other
Independent Detector	other controllera other flight crewa
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:

Flight manager-sfo. Flight was uneventful until sfo traffic area. Flight was cleared for a visual approach on runway 28R sfo and instructed to contact tower over the san mateo bridge. Copilot was flying the approach, autoplt was off, the ILS was tuned for runway 28R and the flight director was in approach mode as backup. We were told to maintain at least 180 KIAS until bridge. As the captain set in tower frequency over bridge, we had a TCASII warning with a pull up indication. I started to deviate and climb as instructed then the captain idented the traffic which was a twin turbo propeller passing us on the left for runway 28L. I continued with this approach and landed. After we taxied off the active runway, I noticed that we were still on approach's frequency. I radioed the tower and asked if we were cleared to cross runway 28L. Tower replied 'yes, and we were trying to reach you.' I replied 'roger, we're clear to cross the left, sorry, we were temporarily off of your frequency.' taxi in was normal. Due to task saturation in the high traffic environment we allowed ourselves to land without clearance. All SOP's and checklists were complied with, including the 1000 ft call when I replied 'runway in sight 28R, we're clear to land.' the captain repeated 'we're clear to land.'

Original NASA ASRS Text

Title: MLG DISTR BY TCASII ALERT LANDS WITHOUT CLRNC.

Narrative: FLT MGR-SFO. FLT WAS UNEVENTFUL UNTIL SFO TFC AREA. FLT WAS CLRED FOR A VISUAL APCH ON RWY 28R SFO AND INSTRUCTED TO CONTACT TWR OVER THE SAN MATEO BRIDGE. COPLT WAS FLYING THE APCH, AUTOPLT WAS OFF, THE ILS WAS TUNED FOR RWY 28R AND THE FLT DIRECTOR WAS IN APCH MODE AS BACKUP. WE WERE TOLD TO MAINTAIN AT LEAST 180 KIAS UNTIL BRIDGE. AS THE CAPT SET IN TWR FREQ OVER BRIDGE, WE HAD A TCASII WARNING WITH A PULL UP INDICATION. I STARTED TO DEVIATE AND CLB AS INSTRUCTED THEN THE CAPT IDENTED THE TFC WHICH WAS A TWIN TURBO PROP PASSING US ON THE L FOR RWY 28L. I CONTINUED WITH THIS APCH AND LANDED. AFTER WE TAXIED OFF THE ACTIVE RWY, I NOTICED THAT WE WERE STILL ON APCH'S FREQ. I RADIOED THE TWR AND ASKED IF WE WERE CLRED TO CROSS RWY 28L. TWR REPLIED 'YES, AND WE WERE TRYING TO REACH YOU.' I REPLIED 'ROGER, WE'RE CLR TO CROSS THE L, SORRY, WE WERE TEMPORARILY OFF OF YOUR FREQ.' TAXI IN WAS NORMAL. DUE TO TASK SATURATION IN THE HIGH TFC ENVIRONMENT WE ALLOWED OURSELVES TO LAND WITHOUT CLRNC. ALL SOP'S AND CHKLISTS WERE COMPLIED WITH, INCLUDING THE 1000 FT CALL WHEN I REPLIED 'RWY IN SIGHT 28R, WE'RE CLR TO LAND.' THE CAPT REPEATED 'WE'RE CLR TO LAND.'

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.