What was found
NLG STRUT EXTENSION, AURAL FIRE WARNING BELL ON BOTH OVERHEAD SPEAKERS WITH NO OTHER INDICATIONS. LIGHTS TESTED NORMAL. BELL WENT OUT AFTER BOTH OVERHEAD SPEAKER C/B'S PULLED. UNEVENTFUL RETURN. PERFORMED PSEU BITE IAW FIM 32-09-03/101. NO FAULTS. PERFORMED EICAS BITE IAW FIM 31-41-00/101. NO FAULTS. PERFORMED AIR/GROUND SYS MX PRACTICES IAW AMM 32-09-02-2-0, ACFT IN AIR MODE. COULD NOT DUPLICATE. PERFORMED AURAL WARNING TEST IAW FIM 31-51-00. NO FAULTS. PERFORMED FIRE WARNING SYS AND WEU TESTS. TESTS SAT. WEU POWER SUPPLIES NO FAULTS. RESTORED ACFT TO GROUND MODE. R & R WEU MODULES - M619 RT, M999 LT, & M1000 IAW AMM 31-51-04-4. PERFORMED WEU CARD FILE TESTS IAW AMM 31-51-04, SAT RESULTS.