Mathematical Problems in Engineering

Research Article

A Maintenance Task Similarity-Based Prior Elicitation Method for Bayesian Maintainability Demonstration

Table 5

Candidate maintenance tasks for each reference task.
Reference taskComponent/equipmentCandidate task
Fault confirmation/checkout HF antenna coupler(1) Press the row key near the HF indicator;
(2) Press the column key near the test indicator;
(3) Press the mode key on the MCDU menu.
HF antenna
Very high-frequency (VHF) transceiver(1) Press the row key near the VHF indicator;
(2) Press the column key near the test indicator;
(3) Press the mode key on the MCDU menu.
Fault isolation The wiring between the transceiver pin AC/8 and the ground terminal(1) Do a check of the circuit breaker status;
(2) Do a check for 115 VAC at pins AC/4, 5, and 6 of the HF transceiver;
(3) Do a check for a ground signal at pin AC/8 of the HF transceiver.
 (1) Do a check of the circuit breaker status;
(2) Do a check for 115 VAC at pins AC/4, 5, and 6 of the HF transceiver;
(3) Do a check for a ground signal at pin AC/8 of the HF transceiver;
(4) Do a check of the wiring from the circuit breaker to the HF transceiver pins AC/4, 5, and 6.
VHF transceiver(1) Do a check of the circuit breaker status;
(2) Do a check for 28 DC at pin AC/2 of the VHF transceiver.
Repair/interchange HF antenna coupler(1) Disconnect the electrical plug;
(2) Place cap on the electrical plug;
(3) Unscrew the nut;
(4) Lower the nut;
(5) Dismantle the antenna coupler;
(6) Place cap on the electrical plug;
(7) Clean the interface and adjacent area;
(8) Check the interface and adjacent area;
(9) Dismantle the cap from the electrical plug;
(10) Check the cleanliness and condition of the electrical plug;
(11) Install the antenna coupler on the shelf;
(12) Screw the nut;
(13) Dismantle the cap from electrical plug;
(14) Check the cleanliness and condition of the electrical plug;
(15) Connect the electrical plug to the antenna coupler.
Audio management unit (AMU)(1) Unscrew the nut;
(2) Lower the nut;
(3) Pull the AMU from the shelf and disconnect the electrical plug;
(4) Dismantle the AMU;
(5) Place cap on the electrical cap;
(6) Clean the interface and adjacent area;
(7) Check the interface and adjacent area;
(8) Dismantle the cap from the electrical plug;
(9) Check the cleanliness and condition of the electrical plug;
(10) Install the AMU on the shelf;
(11) Press the AMU to connect the electrical plug;
(12) Screw the nut.
VHF transceiver(1) Unscrew the nut;
(2) Lower the nut;
(3) Pull the transceiver from the shelf and disconnect the electrical plug;
(4) Dismantle the transceiver;
(5) Place cap on the electrical plug;
(6) Clean the interface and adjacent area;
(7) Check the interface and adjacent area;
(8) Dismantle the cap from the electrical plug;
(9) Check the cleanliness and condition of the electrical plug;
(10) Install the transceiver on the shelf;
(11) Press the transceiver to connect the electrical plug;
(12) Screw the nut.