ASRS REPORT: 80266
| Data Source |
AVIATION SAFETY REPORTING SYSTEM |
| Report Number |
80266 |
| Local Date |
01-JAN-88 |
| Local Time |
0601-1200 |
Synopsis
ACR LGT DESCENDED THROUGH ASSIGNED ALT AFTER READING BACK INCORRECT LOWER ALT WITHOUT ATC CORRECTION.
Assessment
| Event Primary Problem |
HUMAN FACTORS |
| General Results |
NONE REPORTED / TAKEN |
Anomaly Information
| Alt Deviation Anomaly Desc |
EXCURSION FROM ASSIGNED ALTITUDE |
| Anomaly Detected - Person Desc |
AIR TRAFFIC CONTROL |
| Anomaly Detected - Auto Desc |
AIR TRAFFIC CONTROL |
Location Information
| Loc State Code |
FL |
| Loc Ref Airport Name
| FLL |
| Magnetic Bearing (deg) |
285 |
| Reference ID Distance (nm) |
22 |
| Altitude MSL - Single Value(ft)
| 1700 |
Environmental Information
| Weather Conditions |
MIXED |
| Light Condition |
DAYLIGHT
|
AIRCRAFT INFORMATION
Aircraft 1
| Acft Make/Model Desc |
LIGHT TRANSPORT |
| Acft Operator Desc |
AIR CARRIER |
| Acft Flight Mission |
PASSENGER |
| Acft Flight Phase |
INITIAL APPROACH |
| Acft Flight Plan |
IFR |
| Flight Crew Count |
3 |
PERSON INFORMATION
Information For Person Sequence 1
| Reporting Organization |
AIR CARRIER |
| Flt Crew Exp (last 90 days) |
140 |
| Flt Crew Total Exp |
7000 |
| Flt Crew Exp |
5000 |
| Flt Crew Function |
PILOT FLYING |
| Flt Crew Qual Desc |
AIR TRANSPORT PILOT (ATP) |
Narrative
I WAS FLYING AND THE CAPT WAS TALKING TO ATC. WE WERE CLRD TO 4000' BY APCH CTL AND SLOW TO 170 KTS AT 4000'. THE PROB FIRST BEGAN WHEN, BEFORE REACHING 4000', I HEARD A CLRNC TO 1700'. I WAS NOT SURE WHO IT WAS FOR BECAUSE I HAD MISSED THE CALL SIGN. BUT, I DISTINCTLY HEARD THE CAPT READ BACK OUR CALL SIGN AND CLRD TO 1700' LEAVING 5000'. THE CTLR RESPONDED, "ROGER." I REMEMBER LISTENING FOR THE CTLR'S RESPONSE BECAUSE I DID HAVE A QUESTION ABOUT THE CLRNC. MY DOUBT WAS GONE. A SECOND READBACK OF 1700' CLRD ALT TOOK PLACE WHEN THE CTLR AGAIN ASKED US TO SLOW TO 170 KTS. CAPT SAID, "ROGER, SLOW TO 170 KTS THEN DOWN TO 1700'." JUST BEFORE WE LEVELED AT 1700' THE CTLR SAID TO US, "CHK YOUR ALT." CAPT SAID LEVELING 1700' AND I READ BACK 1700'. CTLR SAID, "1700' ALT WAS FOR ANOTHER ACFT, BUT YOU CAN STAY AT 1700'." TO PREVENT THIS FROM HAPPENING AGAIN, ANYTIME I HAVE ANY DOUBT ABOUT A CLRNC I WILL USE THE WORD CONFIRM IN MY READBACK TO INCREASE THE CTLR'S ATTN TO MY READBACK. SUPPLEMENTAL INFORMATION FROM ACN 80109: PASSING 5000' I THOUGHT I HEARD, "COMPANY XAY, DES TO 1700." I READ BACK, "COMPANY XAY DSNDING TO 1700', LEAVING 5000'." AS WE APCHED 4000' THE CTLR SAID, "COMPANY XAY SLOW TO 170 KTS AT 4000'." I REPLIED, "ROGER, SLOW TO 170 KTS AT 4000', DSNDING TO 1700', COMPANY XAY." NO RESPONSE WAS HEARD. AT ABOUT 2400', THE CTLR SAID, "COMPANY XAY, CHK ALT." I REPLIED, "LEAVING 3 FOR 1700', I PREVIOUSLY READ BACK MY CLRNC TO 1700'." THE CTLR RESPONDED, "ROGER, DES NOW TO 1700', THAT CLRNC WAS FOR ACR B XBY." THE COPLT, WHO WAS FLYING THE LGT, TOLD ME THAT THERE WAS SOME QUESTION IN HIS MIND ABOUT THE CLRNC, BUT ALL DOUBT WAS REMOVED WHEN I READ BACK THE CLRNC A SECOND TIME. PERHAPS IF THE F/O VOICED HIS DOUBTS THE FIRST TIME IT COULD HAVE BEEN CLARIFIED. I DO FEEL THE CTLR SHOULD HAVE CAUGHT THE DISCREPANCY ON ONE OF MY READBACKS.
Information For Person Sequence 2
| Reporting Organization |
AIR CARRIER |
| Flt Crew Exp (last 90 days) |
180 |
| Flt Crew Total Exp |
15500 |
| Flt Crew Exp |
9000 |
| Flt Crew Function |
CAPTAIN |
| Flt Crew Qual Desc |
AIR TRANSPORT PILOT (ATP) |
Narrative
Information For Person Sequence 3
Narrative
END REPORT