SDR ASAA2021042034624

Service difficulty report · Indicator · Boeing 737890

Difficulty date: April 20, 2021
Submitted: April 22, 2021
Operation: Air carrier
Aircraft: N570AS
Make and model: Boeing 737890
Aircraft serial: 35185
Aircraft time: 51,931 hours, 15,502 cycles
System (JASC): 2210 · Autopilot System
Part: Indicator
Condition: Inoperative
Location: Mode Control
Part time: 65,885 hours, 28,290 cycles
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

N1 LIGHT ON MCP DOES NOT ILLUMINATE WHEN TESTED. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL IAW B737-800 AMM 22-11-34-000-801 AND AMM 22-11-34-400-801, MODE CONTROL PANEL INSTALLATION TEST PASSES IAW AMM 22-11-34-740-801. LLM MAINTENANCE TEST PASSES IAW AMM 22-11-34/501 - LRU REPLACEMENT TEST FOR MCP BITE TEST GROUP #32 AND DOING LAND VERIFY TEST BITE GROUP #49 AMM 22-11-00/201. AIRCRAFT IS CAT III AUTOLAND AND HGS QUALIFIED.