Flight crew may have landed at sea without a landing clearance.

Attributes
ACN	413090
Time
Date	199809
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sea tower : sea tower : apa
Operator	common carrier : air carrier
Make Model Name	F28 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 35 flight time total : 1570 flight time type : 35
ASRS Report	413094
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : landing without clearance non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

On the last leg of our trip, on final approach, I did not hear the approach controller tell us to contact tower. The approach controller was extremely busy, talking nonstop, and the last thing I heard him say was 'maintain 170 KTS to boeing field.' if he did tell us to contact tower I missed the call, and the captain was busy keeping an eye on a dash 8 landing on the parallel runway, and we were both slightly fatigued due to a reduced rest period. I assumed we had been cleared to land and that we had switched to tower and did not realize we hadn't until we were already on the ground and I was verifying ground was on communication #2. Tower was in communication #2 and approach was in communication #1. We immediately called tower, were cleared to cross the parallel, realized our mistake and I have learned that if I am ever unsure if we have been cleared to land I'll speak up and query ATC.

Original NASA ASRS Text

Title: FLC MAY HAVE LANDED AT SEA WITHOUT A LNDG CLRNC.

Narrative: ON THE LAST LEG OF OUR TRIP, ON FINAL APCH, I DID NOT HEAR THE APCH CTLR TELL US TO CONTACT TWR. THE APCH CTLR WAS EXTREMELY BUSY, TALKING NONSTOP, AND THE LAST THING I HEARD HIM SAY WAS 'MAINTAIN 170 KTS TO BOEING FIELD.' IF HE DID TELL US TO CONTACT TWR I MISSED THE CALL, AND THE CAPT WAS BUSY KEEPING AN EYE ON A DASH 8 LNDG ON THE PARALLEL RWY, AND WE WERE BOTH SLIGHTLY FATIGUED DUE TO A REDUCED REST PERIOD. I ASSUMED WE HAD BEEN CLRED TO LAND AND THAT WE HAD SWITCHED TO TWR AND DID NOT REALIZE WE HADN'T UNTIL WE WERE ALREADY ON THE GND AND I WAS VERIFYING GND WAS ON COM #2. TWR WAS IN COM #2 AND APCH WAS IN COM #1. WE IMMEDIATELY CALLED TWR, WERE CLRED TO CROSS THE PARALLEL, REALIZED OUR MISTAKE AND I HAVE LEARNED THAT IF I AM EVER UNSURE IF WE HAVE BEEN CLRED TO LAND I'LL SPEAK UP AND QUERY ATC.

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.