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Incidents related to Issue 1 incident related to this issue.

Issue: human-centered design philosophy may be lacking (Issue #100)
Description: Automation design may not be guided by a philosophy that gives adequate attention to the proper role and function of the human and to human capabilities and limitations. This may compromise system effectiveness and safety.

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  2. Accession Number: 361956
    Synopsis: A320 ON GARDNER 2 STAR BOS. CLRED CROSS BRONC INTXN 11000 FT 250 KTS PROGRAMMED. CAPT ADVISED USING RWY 33L. ENTERED LNDG RWY IN FMS AND DID NOT NOTICE THE BRONC RESTR DELETED AND THE ACFT REVERTED TO VERT SPD MODE. CTLR QUESTIONED ALT AND VECTORED FOR FURTHER DSCNT.
    Narrative: DURING DSCNT TO BRONC INTXN TO CROSS AT 11000 FT AND 280 KTS, THE CAPT WAS GETTING WX ON THE OTHER RADIO AND I ENTERED THE LNDG RWY 33L INTO THE FMS. THIS CAUSED THE RESTR AT BRONC (280 KTS/11000 FT) TO DELETE ITSELF. I HAD THE ACFT SELECTED TO MANAGED FLT AND DID NOT OBSERVE THAT IT CHANGED TO VERT SPD AND THE RESTR DELETED. CTR REALIZED THAT WE PROBABLY WOULD NOT MAKE THE RESTR AND GAVE US A VECTOR. NO OTHER TFC OR CONFLICTS. THIS WOULD NOT OCCUR IF ONCE A RESTR WAS PLT ENTERED INTO THE FMS IT WOULD NOT AUTOMATICALLY DELETE ITSELF WHEN A DEST RWY IS ENTERED. A PLT ENTERED RESTR SHOULD ONLY BE DELETED BY PLTS, NOT THE FMS. ESPECIALLY SINCE THE ARPT IS 39 NM BEYOND THE RESTR AT BRONC INTXN WHICH IS NORMALLY (250 KTS/11000 FT).
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