B737 crew with multiple MEL's affecting primary flight display and autopilot executed a missed appro...

Attributes
ACN	1320684
Time
Date	201512
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Radio Altimeter
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 283 Flight Crew Type 10500
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 106 Flight Crew Type 3488
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Procedural MEL Deviation - Track / Heading All Types Inflight Event / Encounter Weather / Turbulence

Narrative:

MEL's 34-2X-xx no 1 radio altimeter; 34-1X-xx windshear detection; 46-X-xx opc computer. MEL 25-xx-xx. Left late due to weight restrictions. The alternate was changed and cargo removed to allow for standby passengers. Captain was pilot flying. Crew briefed MEL 34-2X-xx; noting that the flight director would not be used. Captain did not brief that autopilot would turn off when approach was selected. On arrival; airport switched arrival and runway due to frontal passage. Briefed new arrival and approach. Multiple messages from dispatch on arrival for alternate info and landing data due to opc inoperative (MEL 46-X-xx). We are now computed to be 1;000 pounds overweight for landing due to shortened route. Captain chose to lower landing gear at 9;000 feet on arrival. When slowed to 180 knots; selected flaps 15 at 20 miles out to increase drag. Wind was from the south; 45 knot crosswind in heavy rain. Outside of FAF; pilot flying (PF) selected VOR/ILS on nav select switch. ILS data was looking good and PF selected approach mode on MCP. Upon selection; flight directors went away and autopilot turned off. PF turned on autopilot B after diagnosing problem. During the time it took to select ap B; aircraft drifted right of course due to 45 knot crosswind. Executed missed approach. Transferred control to first officer (first officer) for ILS. Landed uneventfully.

Original NASA ASRS Text

Title: B737 crew with multiple MEL's affecting Primary Flight Display and Autopilot executed a missed approach due to Autopilot disconnect and course deviation due to a strong crosswind. Captain transferred control to First Officer for landing.

Narrative: MEL's 34-2X-XX No 1 radio altimeter; 34-1X-XX Windshear Detection; 46-X-XX OPC Computer. MEL 25-XX-XX. Left late due to weight restrictions. The alternate was changed and cargo removed to allow for standby Passengers. Captain was Pilot Flying. Crew briefed MEL 34-2X-XX; noting that the flight director would not be used. Captain did not brief that autopilot would turn off when approach was selected. On arrival; airport switched arrival and runway due to frontal passage. Briefed new arrival and approach. Multiple messages from Dispatch on arrival for alternate info and landing data due to OPC inoperative (MEL 46-X-XX). We are now computed to be 1;000 pounds overweight for landing due to shortened route. Captain chose to lower landing gear at 9;000 feet on arrival. When slowed to 180 knots; selected flaps 15 at 20 miles out to increase drag. Wind was from the south; 45 knot crosswind in heavy rain. Outside of FAF; Pilot Flying (PF) selected VOR/ILS on nav select switch. ILS data was looking good and PF selected Approach Mode on MCP. Upon selection; flight directors went away and autopilot turned off. PF turned on autopilot B after diagnosing problem. During the time it took to select AP B; aircraft drifted right of course due to 45 knot crosswind. Executed missed approach. Transferred control to First Officer (FO) for ILS. Landed uneventfully.

Data retrieved from NASA's ASRS site 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.

B737 crew with multiple MEL's affecting primary flight display and autopilot executed a missed approach due to autopilot disconnect and course deviation due to a strong crosswind. Captain transferred control to first officer for landing.