Tower controller working combined position operation cleared an air carrier aircraft to cross a parallel runway while a C172 was landing and on rollout.

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Attributes
ACN	386934
Time
Date	199711
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mlb
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ptk
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	landing other
Person 1
Affiliation	government : faa
Function	controller : ground controller : local
Qualification	controller : radar
Experience	controller military : 3 controller non radar : 8 controller radar : 10
ASRS Report	386934
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 4000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

An air carrier had landed and was cleared to taxi to the ramp which included crossing an active runway. A C172 was cleared to land on the conflicting runway and subsequently landed as the air carrier was crossing the runway. No 'go around' was issued because there was room for the cessna to safely land and hold short of the intersection, if necessary (which it wasn't). This problem occurred due to combined ground and local functions, and lack of appropriate attention due to non ATC distractions in the cabin attendant.

Original NASA ASRS Text

Title: TWR CTLR WORKING COMBINED POS OP CLRED AN ACR ACFT TO CROSS A PARALLEL RWY WHILE A C172 WAS LNDG AND ON ROLLOUT.

Narrative: AN ACR HAD LANDED AND WAS CLRED TO TAXI TO THE RAMP WHICH INCLUDED XING AN ACTIVE RWY. A C172 WAS CLRED TO LAND ON THE CONFLICTING RWY AND SUBSEQUENTLY LANDED AS THE ACR WAS XING THE RWY. NO 'GAR' WAS ISSUED BECAUSE THERE WAS ROOM FOR THE CESSNA TO SAFELY LAND AND HOLD SHORT OF THE INTXN, IF NECESSARY (WHICH IT WASN'T). THIS PROB OCCURRED DUE TO COMBINED GND AND LCL FUNCTIONS, AND LACK OF APPROPRIATE ATTN DUE TO NON ATC DISTRACTIONS IN THE CAB.

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.