Narrative:

At XA20 local time on last 7/thu/88, our aircraft landed on the lax runway 24R. We entered taxiway 75V, crossed runway 24L and directed to the parking spot of the south side of airport through txwys U. We could well establish a communication with the ground control on the north side of 50 yd line using the north side ground frequency. However, when we switched it to the south one on taxiway 49M, we could not do well because we were in the busy time zone. Thereafter, by an instruction from the ground controller, we made a left turn to taxiway J and came to halt at taxiway 47J. Then they seemed to give us an instruction: 'continue east...,' but which was inaudible, but hesitating what to do, we heard it as if we were instructed to make a right turn. We tried to confirm their instruction west/O receiving their quick response, but they seemed to give us an instruction: 'continue...,' as if they responded to our inquiry. When we wanted to bring the aircraft heading to taxiway 47J, it seemed to us that they gave us an instruction to move ahead because of the following traffic and then to 'continue.' at that time, our aircraft nose section pushed out to the runway edge and we took an instruction 'continue' in the meaning of a clearance of runway crossing which was issued under an agreement between the ground control and the tower control, and then attempted to cross the runway west/O switching the ground frequency to the tower one and also confirming an instruction, 'clear cross...' immediately thereafter, we were told that they issued no clearance of runway crossing. I believe this incident is attributable to the following: notwithstanding ATC instruction was inaudible because communication was in a poor condition with interference, etc, we attempted to proceed with our operations with my poor judgement. On the other hand, I would like to ask the ground controller for issuing a clear instruction using a short wording expressing action such as stop, hold, taxi, go, etc, followed by flight number. In view of this incident, I reflect on my conducts, which we will change to the following lessons in future: do not act by a judgement convenient to oneself, do not move but wait for the next instruction when an instruction was inaudible on the ground full of traffic, and confirm an instruction--waiting for a condition with communication possible. Supplemental information from acn 90943: we vainly tried to go between the very busy ATC communication for our confirmation as possible. There was no room for establishing communication. We operated the aircraft notwithstanding none of our 3 crewmembers confirmed an instruction: 'clear cross...' this is the most important problem. Lessons: do not make haste, do not move when inaudible, advise the captain to confirm once again, never make such speech and behavior as to puzzle the captain, try to communication by the captain's orders and dare to say, 'wait a moment, please!'

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Original NASA ASRS Text

Title: ACR WDB CROSSED ACTIVE RWY WITHOUT CLRNC.

Narrative: AT XA20 LCL TIME ON LAST 7/THU/88, OUR ACFT LANDED ON THE LAX RWY 24R. WE ENTERED TXWY 75V, CROSSED RWY 24L AND DIRECTED TO THE PARKING SPOT OF THE S SIDE OF ARPT THROUGH TXWYS U. WE COULD WELL ESTABLISH A COM WITH THE GND CTL ON THE N SIDE OF 50 YD LINE USING THE N SIDE GND FREQ. HOWEVER, WHEN WE SWITCHED IT TO THE S ONE ON TXWY 49M, WE COULD NOT DO WELL BECAUSE WE WERE IN THE BUSY TIME ZONE. THEREAFTER, BY AN INSTRUCTION FROM THE GND CTLR, WE MADE A LEFT TURN TO TXWY J AND CAME TO HALT AT TXWY 47J. THEN THEY SEEMED TO GIVE US AN INSTRUCTION: 'CONTINUE E...,' BUT WHICH WAS INAUDIBLE, BUT HESITATING WHAT TO DO, WE HEARD IT AS IF WE WERE INSTRUCTED TO MAKE A RIGHT TURN. WE TRIED TO CONFIRM THEIR INSTRUCTION W/O RECEIVING THEIR QUICK RESPONSE, BUT THEY SEEMED TO GIVE US AN INSTRUCTION: 'CONTINUE...,' AS IF THEY RESPONDED TO OUR INQUIRY. WHEN WE WANTED TO BRING THE ACFT HDG TO TXWY 47J, IT SEEMED TO US THAT THEY GAVE US AN INSTRUCTION TO MOVE AHEAD BECAUSE OF THE FOLLOWING TFC AND THEN TO 'CONTINUE.' AT THAT TIME, OUR ACFT NOSE SECTION PUSHED OUT TO THE RWY EDGE AND WE TOOK AN INSTRUCTION 'CONTINUE' IN THE MEANING OF A CLRNC OF RWY XING WHICH WAS ISSUED UNDER AN AGREEMENT BTWN THE GND CTL AND THE TWR CTL, AND THEN ATTEMPTED TO CROSS THE RWY W/O SWITCHING THE GND FREQ TO THE TWR ONE AND ALSO CONFIRMING AN INSTRUCTION, 'CLR CROSS...' IMMEDIATELY THEREAFTER, WE WERE TOLD THAT THEY ISSUED NO CLRNC OF RWY XING. I BELIEVE THIS INCIDENT IS ATTRIBUTABLE TO THE FOLLOWING: NOTWITHSTANDING ATC INSTRUCTION WAS INAUDIBLE BECAUSE COM WAS IN A POOR CONDITION WITH INTERFERENCE, ETC, WE ATTEMPTED TO PROCEED WITH OUR OPS WITH MY POOR JUDGEMENT. ON THE OTHER HAND, I WOULD LIKE TO ASK THE GND CTLR FOR ISSUING A CLEAR INSTRUCTION USING A SHORT WORDING EXPRESSING ACTION SUCH AS STOP, HOLD, TAXI, GO, ETC, FOLLOWED BY FLT NUMBER. IN VIEW OF THIS INCIDENT, I REFLECT ON MY CONDUCTS, WHICH WE WILL CHANGE TO THE FOLLOWING LESSONS IN FUTURE: DO NOT ACT BY A JUDGEMENT CONVENIENT TO ONESELF, DO NOT MOVE BUT WAIT FOR THE NEXT INSTRUCTION WHEN AN INSTRUCTION WAS INAUDIBLE ON THE GND FULL OF TFC, AND CONFIRM AN INSTRUCTION--WAITING FOR A CONDITION WITH COM POSSIBLE. SUPPLEMENTAL INFO FROM ACN 90943: WE VAINLY TRIED TO GO BTWN THE VERY BUSY ATC COM FOR OUR CONFIRMATION AS POSSIBLE. THERE WAS NO ROOM FOR ESTABLISHING COM. WE OPERATED THE ACFT NOTWITHSTANDING NONE OF OUR 3 CREWMEMBERS CONFIRMED AN INSTRUCTION: 'CLR CROSS...' THIS IS THE MOST IMPORTANT PROB. LESSONS: DO NOT MAKE HASTE, DO NOT MOVE WHEN INAUDIBLE, ADVISE THE CAPT TO CONFIRM ONCE AGAIN, NEVER MAKE SUCH SPEECH AND BEHAVIOR AS TO PUZZLE THE CAPT, TRY TO COM BY THE CAPT'S ORDERS AND DARE TO SAY, 'WAIT A MOMENT, PLEASE!'

Data retrieved from NASA's ASRS site as of August 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.