On page 143 of the Core Rulebook (Traveller Mongoose) under section Repairs it specifies how and how much to repair Hull Damage, Structure Damage and System Damage, but there is no mention of Armor Points, that indeed can be damaged by the result of 7 on the Ship's Damage Location Table (page 151) that specifies armor is reduced by one, and if Armour is already 0 then this counts as Hull hit.
Appreciated RAW, RAI and rules from other editions, I'm interested on the economic part of it, so other editions should use similar prices as is the same universe, as House Rule I'm actually using the same rule as for Hull Hits (1-6 Hours, 1 ton of spare parts), but I feel some cost should be added, or at least the cost of this "1 ton of spare parts" that I feel it should be specified for Hull case too.