Consumables & expendables · part number

177-1-L

This number names 2 distinct parts in the graph — a shared stock number or customer reference, never merged by guesswork. Pick the part you hold:

This crosswalk identifies candidate equivalents with cited evidence. It is not an airworthiness approval. Substitution decisions remain subject to your organisation’s procurement and engineering approval process and the governing maintenance data (AMM/CMM/SRM/CML/OMAT).