SF-340 CREW FLEW AN APCH TO ILS RWY 1; AT APN WHEN THE LOM WAS OUT OF SVC. THEY OBSERVED THE ADF IS REQUIRED FOR THE MISSED APCH.

2003-03 · NASA ASRS report 576010

Date: 2003-03 · Aircraft: SF 340A · Phase: approach

Anomalies: deviation-discrepancy-procedural-far|deviation-discrepancy-procedural-published-material-policy|other-lom-out-of-svc-adf-required-not-listed-on-apch-plate

Synopsis

SF-340 CREW FLEW AN APCH TO ILS RWY 1; AT APN WHEN THE LOM WAS OUT OF SVC. THEY OBSERVED THE ADF IS REQUIRED FOR THE MISSED APCH.

Narrative

PLEASE REFER TO APCH CHART FOR ILS 1 AT APN PAGE 11-1 DATED FRI/JULY/02. WHILE SHOOTING THE ILS 1 AT APN ON ACR X AIRLINES FLT ABCD; WE (THE CREW) HAD REALIZED THAT FELPS (AP) COMPASS LOCATOR WAS OUT OF SVC. SINCE THIS FIX IS ALSO IDENTIFIABLE BY DME AND THE OUTER MARKER BEACON; WE DID NOT FORESEE A PROB AND CONTINUED THE APCH. AFTER LNDG IN APN; THE FO AND I RECEIVED THE APCH AGAIN AND REALIZED THE MISSED APCH INSTRUCTIONS CALL FOR A CLB TO 1100 FT THEN A CLBING LEFT TURN TO 2800 FT DIRECT TO AP LOM AND HOLD. SINCE FELPS COMPASS LOCATER WAS OUT OF SVC; GOING DIRECT TO FELPS WOULD NOT HAVE BEEN POSSIBLE. ALTHOUGH IT WOULD HAVE BEEN POSSIBLE TO NAVIGATE TO FELPS BY GOING DIRECT TO APN VOR; TRACK OUTBND ON IAPN LOCALIZER; THEN HOLD AS PUBLISHED AT THE FIX USING DME TO IDENTIFY FELPS. WE COULD HAVE ALSO ASKED APN TWR FOR ALTERNATE MISSED APCH INSTRUCTIONS. WE ALSO CONFIRMED THAT THERE WAS NO NOTE ON THE APCH CHART STATING ADF REQUIRED. THE CONFLICT SEEMS TO BE THAT ALTHOUGH ADF IS NOT REQUIRED FOR THE ACTUAL APCH; IN ORDER TO FLY 'DIRECT' TO AP LOM IN THE MISSED APCH; IT WOULD BE ACCOMPLISHED BY USING ADF. THEREFORE I DON'T THINK WE SHOULD HAVE FLOWN THE ILS WITH FELPS (AP) COMPASS LOCATER OUT OF SVC. THIS ALSO BRINGS UP A QUESTION. WHAT CRITERIA IS REQUIRED TO HAVE THE NOTE 'ADF REQUIRED;' ON AN APCH PLATE?

Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.

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