The unit received its first six Alouette III in Nov 1966, while it was based at Nampula in Mozambique. They were usually operated from satellite bases and typically two were deployed at Vila Cabral and four at Mueda (a fifth joined subsequently). During Jun and Jul 1970, the whole squadron was detached to Mueda in support of Operação Nó Górdio. 
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Models Esq 503 List of helicopters |
| C/N | Version | Built | In this Org | In other Org | |
|---|---|---|---|---|---|
Esquadra 503 Operations |
| Dates | Operation | |
|---|---|---|
| 1973-sep-15 | 1973-sep-16 |  Operação Auréola |
| 1973-jan | 1975-jan | Operation Hurricane |
| 1970-jun-25 | 1970-jul | Operação Nó Górdio |
| 1969-jun-07 | 1969-jun-09 | Operação Zeta |
