Its been awhile since I posted this, but couldn't look at it, anyhow I just couldnt make out his wrapper function works.

On the side note it's not a controller method, I guess the naming of my function got confused, anyhow here's the code again...

public with sharing class AircraftController {

    private final Aircraft__c parentAC;
    private List<Aircraft_Eligible_Event__c> ACEligible_Event= new List<Aircraft_Eligible_Event__c>();
   
    private List<Equipment__c> Equipment = new List<Equipment__c>();
  
    public List<Constituent_Assembly__c> ConstAssemb = new List<Constituent_Assembly__c>();
    public List<Constituent_Assembly__c> ConstAssembEngine = new List<Constituent_Assembly__c>();
    public List<Constituent_Assembly__c> ConstAssembGear = new List<Constituent_Assembly__c>();
    public List<Constituent_Assembly__c> ConstAssembApu = new List<Constituent_Assembly__c>();
    
    private final Lease__c Lease;
    private final Operator__c Operator;
   
    private ID parentAC_ID;
    private ID ACEligible_Event_ID;
    private ID Lease_ID;
    private ID OperatorID;
   
    public String email {get;set;}
   
    public class EquipmentWrapper {

        public Equipment__c equipment {get;set;}

        public integer count {get;set;}

 

    }
 
    public AircraftController () {
   
        List<Aircraft__c>   Ac_spec = [select id, Aircraft_Type__c, Assigned_To__c, Country_Of_Registration__c,
                                                  CSN__c, Cycles_Since_Last_C_Check__c, Lease__c,Approach_Landing_Cat__c,
                                                  Number_of_engines__c, Registration_Number__c,ETOPS__c,Line_Num__c,
                                                  Time_Remaining_To_Check__c,TSN__c, Aircraft_Variant__c,
                                                  Auxiliary_Tank_Capacity_Gallons__c, Auxiliary_Tank_Capacity_Kilograms__c,
                                                  Auxillary_Tank_Capacity_Pounds__c, Maximum_Landing_Weight_Max__c,
                                                  Maximum_Landing_Weight_Operational__c, Maximum_Landing_Wt_Purchased_Leased__c,
                                                  Maximum_Operational_Take__c, Maximum_Take_Off_Wt_Max_Design__c,
                                                  Maximum_Take_Off_Weight_Operational__c, Maximum_Zero_Fuel_Wt_Max_Design__c,
                                                  Maximum_Zero_Fuel_Wt_Operational__c, Maximum_Zero_Fuel_Wt_Purchased_Leased__c,
                                                  Standard_Fuel_Capacity_Gallons__c, Standard_Fuel_Capacity_KG__c,
                                                  Standard_Fuel_Capacity_Pounds__c
                                             from Aircraft__c where id =  :ApexPages.currentPage().getParameters().get('id')];
                                                                                                         

    
    
     Equipment = EquipmentList(parentAC);
   }
   

   
     public List<Equipment__c> EquipmentList(Aircraft__c aircraft)
    {
        List<Equipment__c> Equipment = new List<Equipment__c>();
       if (aircraft!=null)
        {
            Id aircraftID = aircraft.ID;
            Equipment = [select id, ATA__c, Description__c, Part_Number__c, Serial_Number__c, Vendor__c from
                           Equipment__c where Aircraft__c = :aircraftID AND
                           (ATA__c = '23' or ATA__c = '25' or ATA__c = '31' or ATA__c = '32'
                           or ATA__c = '34' or ATA__c = '39' or ATA__c = '70' or ATA__c = '22')
                           Order By ATA__c Asc]; 
                          
        } 
          
        return Equipment;
    }
   
    public List<Equipment__c> getEquipment(){
        integer i;
      
        List<equipmentwrapper> wrappers = new list<equipmentwrapper>();

        for (Equipment__c e : Equipment) {
           

            if (e.(i-1) == e.(i)) {

                    wrappers.(i++);

            } else {

            List<equipmentwrapper>   wrapper = new list<equipmentwrapper>();

                wrapper.equipment = e;

                wrappers.add(wrapper);

            }

        }

         return wrappers;

    }
          
    public PageReference sendPdf() {
    
    PageReference pdf = Page.InvoiceGenerator;
    // add parent id to the parameters for standardcontroller
    pdf.getParameters().put('id',parentAC.id);
 
    // the contents of the attachment from the pdf
    Blob body;
 
    // returns the output of the page as a PDF
    body = pdf.getContent();
 
   
 
    Messaging.EmailFileAttachment attach = new Messaging.EmailFileAttachment();
    attach.setContentType('application/pdf');
    attach.setFileName('AcSpecSheet.pdf');
    attach.setInline(false);
    attach.Body = body;
 
    Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
    mail.setUseSignature(false);
    mail.setToAddresses(new String[] { email });
    mail.setSubject('Maintenance Reserve Invoice');
    mail.setHtmlBody('Here is the email you requested! Check the attachment!');
    mail.setFileAttachments(new Messaging.EmailFileAttachment[] { attach });
 
    // Send the email
    Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail });
 
    ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.INFO, 'Email with Invoice sent to '+email));
 
    return null;
 
  }

}

I just couldnt make it work wonder what is wrong?

Thanks in advance

S.Aj