SDR ASAA2020042232659

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: April 20, 2020
Submitted: April 22, 2020
Operation: Air carrier
Aircraft: N407AS
Make and model: Boeing 737990ER
Aircraft serial: 41731
Aircraft time: 29,121 hours, 9,227 cycles
System (JASC): 3442 · Weather Radar System
Part: Unknown
Condition: Malfunctioned
Location: Weather Radar
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

F/O'S AUTO-TILT MODE FOR WEATHER RADAR DOES NOT WORK. SHOWS GROUND RETURNS AT 40 NM IN ALL MODES. MANUAL TILT WORKS ON F/O SIDE AND ALL MODES WORK CORRECTLY ON CAPTAIN'S SIDE. GROUNDED - YES. PERFORMED WXR RADAR SYSTEM BITE TEST REF B737-900 AMM 34-43 TASK 801. NO DEFECTS NOTED. PERFORMED WEATHER RADAR (WXR) SYSTEM-OPERATIONAL TEST REF AMM TASK 34-43-00-710-802-001. NO DEFECTS NOTED. A/C RELEASED FROM MEL 34-15H.